This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

This mass grave for victims of a massive hurricane remained hidden until 1991.

This century-plus-old baseball park has hosted some of baseball's royalty and stands as the oldest sports complex in Jacksonville.

After serving in Vietnam, Korea, and even a stint in the Turkish navy, the unique ship is now open as a museum.

The last standing silent film studio in Jacksonville is the last remnant of the city's once-thriving movie industry.

This replica of a 16th-century French settlement memorializes one of the earliest attempts at a European settlement in North America.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

Florida's first suspension bridge.

This hauntingly beautiful stretch of Florida coastline is covered in sun-bleached trees.

This now-deactivated naval base defended the Florida coast for centuries.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

Jacksonville's highways rendered this century-old grammar school unusable.

A monolith replica monument of Jean Ribault commemorating the landing of the French in the New World.

St. Augustine's record-setting narrow street was designed to protect against pirates.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

This abandoned bridge is now a favorite haunt for graffiti artists.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This super steep hike ascends 2,000 feet in less than a mile.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

The ruins of an open-air theater built on this Georgia island in the 1970s.

A modest walled graveyard where nobody is actually buried.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

This monument claims to display the first pot used to cook a famed Southern stew.