Lion heads on the massive bronze front doors greet visitors as they enter the 60,000-square-foot Gilded Age mansion built by Henry Flagler in 1902. The Standard Oil and Florida East Coast Railway magnate ushered in the Gilded Age, a period of opulence and rapid industrialization. Much of South Florida's history rides the rails as Flagler's railway pushed south to Key West in 1912. Details: Noon-5 p.m. Sunday, 10 a.m.-5 p.m. Tuesday-Saturday; One Whitehall Way, Palm Beach; 561-655-2833, FlaglerMuseum.us. Tickets: $18 for adults, $10 for ages 13-17, $3 for ages 6-12, free for younger than 6.