Mansions are fascinating, oozing with extravagant opulence or dripping with Southern charm and magnificent splendor, like the plantation homes in the South.

Alva Belmont was a prominent Gilded Age socialite who married a Vanderbilt railroad heir. Later in life, she became a women's suffrage activist.

This New $55 Million Greenwich Mansion Has Both Indoor and Outdoor Pools The massive abode includes a suite of amenities that include a sauna, a yoga studio, a packing room, and so much more.

New York City's Fifth Avenue was once home to "Millionaires' Row," where the wealthiest business tycoons of the Gilded Age built palatial homes.

Eagle's Nest was built for William K. Vanderbilt II between 1910 and 1936, and is now home to a museum, planetarium, hiking trails, and more.

Eagle's Nest was built for William K. Vanderbilt II between 1910 and 1936, and is now home to a museum, planetarium, hiking trails, and more.

Cotton Holdings Chairman and co-CEO Pete Bell is listing his nearly 10,000-square-foot mansion in River Oaks after owning it for just two years.

Dive into the ultimate project: building a secret underground mansion complete with a spectacular swimming pool! From the hidden design to the intricate construction process, this masterpiece is a ...

Donald Trump reacts to Iran's strike on US base What's it like to fly a B-2 bomber for 2 days straight? Here's what record-holding pilots say. I'm a heart surgeon and heart attack survivor. Never ...