A 6-acre Vanderbilt equestrian estate from the Gilded Age is listed for $3.5 million. Take a look inside.

• Sandy Point Farm was built in 1902 for Reginald Claypoole Vanderbilt in Portsmouth, Rhode Island.
• His father, Cornelius Vanderbilt II, built the Breakers mansion in Newport.
• Sandy Point Farm, now listed for $3.5 million, has 24 stables and a 15,000-square-foot riding arena.

Rhode Island is full of architectural marvels from the Gilded Age , but these historic properties rarely hit the market.

That's what makes Sandy Point Farm, a 1902 equestrian estate that belonged to a Vanderbilt heir, a rare find.

Sotheby's Concierge Auctions is listing the 6-acre property for $3.5 million. It will open for bidding on October 17.

Take a look at the historic estate.

Sandy Point Farm, a historic equestrian estate, is in Portsmouth, Rhode Island.

Portsmouth is around 9 miles north of Newport, Rhode Island, where elite members of Gilded Age society built opulent summer cottages such as Marble House and The Elms .

It was built for Reginald Vanderbilt, son of Cornelius Vanderbilt II, in 1902.

Cornelius Vanderbilt II, the grandson of railroad magnate Cornelius Vanderbilt , built the famous 138,300-square-foot Breakers mansion in Newport in 1895.

Reginald Vanderbilt inherited $10 million from his father, according to his 1925 obituary in Time magazine . When adjusted for inflation, his net worth would have equaled around $180 million in 2024.

An avid equestrian, Reginald Vanderbilt served as the president of the Association of American Horse Shows and the Hackney Horse Society. He also founded the United States Equestrian Federation.

Reginald Vanderbilt was married twice. He and his second wife, Gloria Morgan Vanderbilt, had one daughter together, also named Gloria. She grew up to be a fashion designer and mother of CNN's Anderson Cooper .

After struggles with gambling and alcoholism, Reginald Vanderbilt died at Sandy Point Farm at age 45 in 1925.

The property spans 6.15 acres.

In total, Sandy Point Farm features eight bedrooms and 5.5 bathrooms over 30,269 square feet, according to the listing.

The spacious estate features more than 30,000 square feet of stables.

The stables contain 24 stalls for horses.

A 15,000-square-foot indoor arena provides space for riding and training.

The riding ring features 60-foot ceilings with beams made of grand cypress wood.

Sandy Point Farm also features a groom's quarters and a guest lounge.

The buildings house saddles, bridles, and other equestrian gear.

Architect A.S. Walker designed the property in the Colonial Revival style.

The stables feature cupolas, dome-like structures on the roof that improve ventilation and allow for natural light.

Sotheby's Concierge Auctions listed the estate for $3.5 million.

Bidding will be held from October 17 to 31 with starting bids between $1 million and $2 million.

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