Buy your own celebrity hideaway! Castle adored by Michael Douglas and Jack Nicholson goes on sale for £3.9m (and even comes with Europe's largest treehouse)

•  Ackergill Tower near John O'Groats, the most northerly point in Scotland, is being sold for a huge £3.9million
• The property has 32 bedrooms in the tower alone, a pub and Europe's largest ever tree house with six rooms
• The huge property - used as a luxury hotel - also has a pub, a Victorian walled garden and a boathouse

A celebrity hide-out, complete with Europe's largest tree house and an on-site pub has gone on sale.

Ackergill Tower has attracted the likes of Jack Nicholson, Michael Douglas, and entrepreneur Richard Branson in recent years, but now, it will be offered to a private buyer.

The 15th century castle has been run as a luxury hotel and wedding venue and has a staggering 32 rooms in the tower based near John O'Groats, the most northerly point in Scotland.

Stunning sea views and a 500-year history have left the propety with a hefty price tag of £3.9m.

But there is plenty of opportunity for the new owners to set up a business - especially in the gigantic tree house which comprises of six rooms and its own pub, ceilidh hall.

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The striking 15th century Scottish castle by the sea has gone on sale for a staggering £3.9million. The stunning venue has attracted a list guests like Jack Nicholson and Michael Douglas

Ackergill Tower is believed to date from 1475 and over its 500-year history it was often besieged during feuds between Scottish clans.

It was extended in the mid-19th century by Scottish architect David Bryce and was restored in the 1980s to its former grandeur.   

Businessman Mike Clare, who founded bed retailer Dreams, bought and converted it in 2009 but he is now selling the impressive property.

The property currently operates as a country house hotel but has also been an exclusive wedding, party and conference venue in the past.

The five-storey tower is steeped in history but has had 21st century luxuries added and has 32 bedrooms, 31 bathrooms and ten reception rooms including the impressive wood-panelled Great Hall.

There is plenty of additional accommodation in the 30 acres of grounds, including the converted stables which sleep ten people and Europe's largest treehouse, which sleeps two.

The treehouse is in a 150-year-old Sycamore tree and has a 7ft round bed and a large circular bath, as well as 360-degree views of the surrounding woodland and a 'twilight ceiling' so guests can gaze up at the stars through the tree's branches.

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Private parties and weddings have been held in the wood panelled dining room. The stunning property is near John O'Groats in Caithness, the most northerly point in Scotland

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The tower, complete with a huge tree house and 32 rooms, guest houses and seaside cottages is near John O'Groats in Caithness

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The tower has classic, executive and deluxe rooms which guests have been enjoying for decades. The castle itself was built 600 years ago 

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The striking 15th century Scottish castle stands on the shoreline at Sinclair Bay on the northernmost tip of Scotland

There is also the Smugglers Inn pub, a beautiful Victorian walled garden, a Bothy and a boathouse.

It also has a lease of shooting and fishing rights over a neighbouring 3,000 acres.

Michael Jones from Knight Frank said: 'It's a totally unique property, the tower is spectacular in itself and the location is also spectacular right on the sea.

'It's currently running as a hotel but for some wealthy people it would be a great place to have a private residence as well - you could certainly do a fair bit of entertaining.

'You could use the main castle as your home and use the other properties on the site as guest accommodation when you need it or as holiday rentals.

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The tower has attracted some world famous guests including entrepreneur Richard Bransom, Jack Nicholson and Michael Douglas

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A treehouse has been built around a 150 year old sycamore tree in the grounds of the luxury tower. The treehouse features a large circular bath, 7ft round bed and use of a microwave and fridge

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Fine dining and events have been held at the castle for decades. Weddings and functions are also held at the £3.9m venue 

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 The Ackergill Tower Estate has its own pub called the ‘Smugglers Inn' which features a log fire and a fully stocked bar for guests to relax in 

'There's a whole variety of possible uses and we've had a real mix of interest from the commercial sector and private owners.

'It looks a long way north, it is at the top of Scotland but there's an airport nearby and helicopters can land at the castle itself.

'It's got stunning views across the water and it's a spectacular position on the clifftop.

'This is a very rare opportunity. There are one or two Scottish castles that come on the market every year but something in this condition, of this magnitude and location is pretty much a one-off.

'I think the last time there were was a property of this calibre on the market was when this was sold ten years ago.'

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There is room for ten in the tastefully designed 'Smiddy' with mezzanine level combines traditional architecture with modern equestrian style décor

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Ackergill Tower says: 'All bedrooms have their own bespoke design and unique character with period details, sumptuous furnishings and all the modern luxuries you need to make the most of your Highland escape'

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The tower has numerous bedrooms and self-contained cottages for guests to say in. In the past it has been used as a luxury Highlands hotel

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There are also cottages which can be rented on-site. The Stables 'smiddy' is a four bedroom Scottish luxury holiday cottage sleeping up to ten people

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The lavish tower and surrounding grounds are going on sale for £3.9million. The tower itself has a whopping 32 rooms, but it also has its own pub, ceilidh hall and the impressive treehouse is just one of six self-contained holiday cottages

The ULTIMATE fixer-upper! Husband and wife are to plough £20MILLION into renovating a semi-derelict mansion with 102 rooms to turn it into a luxury five-star hotel

• Paul and Rowena Williams bought the 102-bed property near Caernarfon in Gwynedd, Wales, two years ago
• Hotelier couple plan to have the building open to the public for business in 2020 - one year ahead of schedule
• Photos from before the renovation show the building with damaged floors, dirty walls and rundown interior
• But recent images show halls covered in luxurious red carpet, bathrooms lined with shiny tiles and walls adorned with beautiful antique ornaments and decorations

A husband and wife are to plough £20 million into renovating a semi-derelict mansion with over 100 rooms to turn it into a luxury five-star hotel.

Paul and Rowena Williams bought the 102-room property in Wales two years ago and have already restored the south wing.

Photos before the renovation show the entrance hall with damaged floors and dirty walls. But recent 'after' shots show the grand staircase covered in a luxurious red carpet, shiny tiles and beautiful antique ornaments.

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A husband and wife are ploughing £20 million into renovating this semi-derelict, 102-bedded mansion to turn it into a luxury five-star hotel

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Paul and Rowena Williams bought Plas Glynllifon, near Caernarfon in Gwynedd, two years ago and have already restored the south wing

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Before and after: This master suite has had a complete makeover. The couple want to keep a 19th century theme running throughout the mansion

The stunning mansion was once home to Lord Newborough and was recently opened to the public to show off the latest renovations.

Mr Williams, 54, hopes to eventually turn Plas Glynllifon, near Caernarfon in Gwynedd, into a five-star luxury hotel.

The semi-derelict structure was bought as a wedding venue venture in 2013 but the plans fell through.

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The stunning property (pictured with scaffolding around it while being renovated) was once home to Lord Newborough and was recently opened to the public to show off the work that had been done

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Photos before the renovation show the entrance hall with damaged floors and dirty walls (left). But recent shots show the hallway with a luxurious red carpet and beautiful antique ornaments (right)

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The huge building has its own church. Each room takes on a different theme, with antiques and artworks sourced across the world - imitating the mansion in its 19th Century heyday

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A workman fixes up one of the property's many rooms before installing a magnificent chandelier on its ceiling (right)

Mr Williams said: 'There was a smell of damp and mould and must was all around. Severe water ingress everywhere. The stench itself was a little bit off-putting, to be honest.

'Before we purchased it, we spent four days surveying it, so we knew what we were letting ourselves in for.'.

The couple hope the restoration will be complete by 2020 - a year ahead of schedule.

They recently opened the doors to the public and 2,000 people flocked in to see it.

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The couple hope the restoration will be complete by 2020 - a year ahead of schedule. They recently opened the doors to the public and 2,000 people flocked in to see it

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A team of construction workers install a chandelier in the property's grand hallway. The semi-derelict structure was bought as a wedding venue venture in 2013 but the plans fell through

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A beautifully tiled, spacious bathroom. The couple hope the restoration will be complete by 2020 - a year ahead of schedule

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Mr Williams said: 'We're investing a significant amount of money in this property at our risk, and we just want the restoration to extend to the ground, as it really should do'

Each room takes on a different theme, with antiques and artworks sourced across the world - imitating the mansion in its 19th Century heyday.

The couple have also put forward plans to gain the pleasure gardens - which span 30 hectares from the mansion.

The grounds include miles of paths through woodland, with a slate amphitheatre, a deserted fort, a mausoleum, hidden memorials, fountains and artwork. There is even an old militia fort - Fort Williamsburg - dating to 1761.

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In 1999 the mansion was bought by German rock star Ulrich John Roth of the band Scorpions for £500,000 

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Plas Glynllifon was originally built by Spencer Bulkeley Wynn, the third Lord Newborough, with the main house completed in 1848. Pictured: The mansion was in a dilapidated state when the Williams’s bought it in 2016

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Although it currently has 102 bedrooms, the hotel will have between 35-42 bedrooms when completed

Under the proposals from the Williams' would take ownership of these areas and then establish a 999-year lease.

Mr Williams said: 'We're investing a significant amount of money in this property at our risk, and we just want the restoration to extend to the ground, as it really should do.'

Many of the features are owned by the agriculture college - Coleg Glynllifon. The park itself is owned and maintained by Gwynedd council.

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The couple are in talks with the college and council about their proposal. A new not-for-profit firm would run the park. Pictured: A very rundown en-suite 

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Mr Williams added: 'If we can obtain more land, we can really have a proper visitor destination here, with a wider experience'

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The hotelier couple own several properties across Wales and have been in the hotel business since 1999

The couple are in talks with the college and council about their proposal. A new not-for-profit firm would run the park.

Mr Williams added: 'If we can obtain more land, we can really have a proper visitor destination here, with a wider experience.

'We've got the expertise - we've been in the hotel industry now since 1999.

'I wanted to do something that was really stunning - and this is a once-in-a-lifetime opportunity to restore something that is almost lost.'

In 1999 the mansion was bought by German rock star Ulrich John Roth of the band Scorpions for £500,000.