An idyllic riverfront estate in the historic town of Foxburg, Pennsylvania has been listed for sale for $15 million (£12.4m). Dating back to 1796 with ties to the founding of the Quakers, it has a fascinating past and sits in more acres than you'd know what to with. Let's take a look around...

The Riverstone Estate was originally owned by descendants of George Fox, the founder of the Quaker religion. The Quakers first set foot in Pennsylvania in 1681, when King Charles II granted William Penn, also a Quaker, a charter for the area. George Fox's brother, James, who the town of Foxburg is named after, went on to purchase 5,000 acres of land from William Penn just four years later to set up a cotton mill.

In 1796 George Fox's grandsons, Samuel Mickle Fox and his brother George, purchased 6,600 acres of land along with their brother-in-law's, Joseph Parker Norris and George Roberts from the Commonwealth of Pennsylvania, with it eventually becoming known as Fox Farm. 

Samuel's son, Joseph Mickle Fox, who was a practising lawyer, moved to the land in 1820 and began construction of the main stone house, which took eight years to complete. In the near 200 years since the mansion was built, there have been many additions made to the Federal-style property. In 2002 it underwent a huge renovation, being stripped down to the bare stone walls and completely refurbishing the interior and exterior.

Currently on sale for $15 million (£12.4m), the farm, now known as Riverstone Estate, has developed over the years to have six miles of river frontage with 26 separate buildings. The grounds surrounding it are just as extensive with 23 ponds, miles of walking trails and a cemetery where the Fox family are buried. Let's take a look inside...

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Today, the grand mansion has five bedrooms, five bathrooms and four powder rooms just to name a few of the luxurious spaces. The glass-walled conservatory overlooks the stone patio and one of many ponds in the grounds. Inside, it has decorative stained glass windows and a skylight that's surrounded by a mahogany ceiling.

The mansion spans three floors and is packed full of modern-day amenities – such as heated floors and steam rooms in some of the bathrooms – while preserving the traditional look and feel of the decor. Other spaces include a library, music room and a wine cellar and each room features a different hardwood floor and its own unique design. 

The formal dining room, which leads out to the conservatory, is decked out in cherry wood and features a herringbone pattern on the floor that is bordered by black walnut and tiger maple. The opulent hearth in the centre is surrounded by expensive yellow onyx and decorative carved wood. 

The fully-finished basement is the perfect place to hide a furnished English-style pub complete with copper tin ceiling, a billiards table, bar and a wine cellar that stores 500 bottles. 

As time went on, the Foxes added to their estate. The carriage house, which sits adjacent to the mansion, was designed in 1876 by Frank Heyling Furness, an acclaimed American architect. Built by a family friend, it was restored in 2001 to its former glory. 

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The first floor of the building functions as a carriage room, while the second floor is a guest home complete with a master suite, living space, kitchen and dining room.

Sitting just south of the carriage house is the greenhouse. Designed and built by noted greenhouse manufacturers, Lord & Burnham, it was restored in 2005 using old photographs for added authenticity. Made from glass and stone, it's a gardener's idea of heaven with metres of sheltered beds and even a potting shed for propagating plants.

The estate isn't short of outhouses with barns and buildings aplenty. The West Barn was built in 2001 using the frame of a reclaimed Pennsylvanian bar. The larger of the two barns on-site, it features a silo and has a four-stall garage with a second-floor workshop. 

The East Barn was also built in 2001 and is mainly used for storing farm equipment and straw. At the back, it also features a reused cupola from a church in Eastern Pennsylvania.

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If you think the estate already has a surplus of storage space, you'll be surprised to hear it also has a dedicated woodshed between the barns. One of the few original structures on the estate, it was given new siding during the major refurb in 2002.  

Just behind the woodshed sits the aviary. The unusual-looking space was constructed in 2001 and is made from red cedar logs. Last home to two peacocks, it has a slate roof and copper copula, which adds a finishing touch to the unusual structure. 

Sitting in a gated enclosure to ensure no escapees, the aviary is also covered with netting. Inside, it has a low ceiling and plenty of space to perch for the birds.

Not short of space for animals, the estate also has an alpaca barn, which was built in 2001, and a chicken house that was restored and expanded in 2003. 

Originally used to house horses, the sheep barn was updated with new cedar siding in 2004. In the field next door, there's a lean-to with a red roof that was crafted with stone from the estate. Today, both the barn and lean-to provide shelter for the sheep.

Today, the estate is home to a huge equestrian centre. Redesigned in 2003, it features an events centre and an indoor riding area that's equipped with a dust control sprinkler system, a bar and a viewing room. 

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The original dairy barns, which were built in 1910 were redesigned in 2003. Each measuring 188 feet in length and 38 feet wide, they are connected to form a traditional H shape. The whole facility is now home to the carriage museum, barn stables, vet room and the events centre.

The complex also has accommodation for the Equestrian Centre patrons and is home to the one-bed barn manager's apartment plus a guest quarters. The guest apartment features a master bedroom with a cathedral ceiling, a loft space and French doors that lead to a second storey deck. Overall the estate houses 10 properties. 

The garden house is located right next to the green and is known for its handmade stained glass back door and glazed brick interior.

Surrounded by 12,000 acres of land, the estate will offer the next buyer a life of luxury and privacy. Located at the intersection of the Allegheny and Clarion Rivers, it has six miles of river frontage, several miles of trails and 23 ponds throughout the property.

One of the largest privately-owned estates in Pennsylvania, Riverstone is full of stunning architecture, state of the art amenities and of course, exquisite grounds and is the perfect place for a relaxing escape to the country. It could all be yours for $15 million (£12.4m). 

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