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

Explore Hempstead House on Long Island's Gold Coast, once home to the Guggenheims and now a public museum at Sands Point Preserve.

Opening in 1897, the Belleview Hotel quickly became a favorite for America's elites, hosting families like the Vanderbilts, ...