The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Try not to get slimed in Tribeca.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A crumbling hospital from the 1850s on Roosevelt Island.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

This curio museum seems like the type of place you might find a mogwai or a monkey's paw.

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

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

Found: Garden of Eden in Miami-Dade County, Florida.

This Florida arena, once host to "the fastest game in the world," has sat empty for 25 years.

A gaudy painted elephant stands in memory of south Florida's fallen carnies.

For 32 years the famous Ringling Bros circus troupe spent winters in this sunny spot in Florida.

For a time this small Florida town of less than 1,000 residents was the national leader in dismemberment.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

A museum preserving one company’s history of preserving food.

How Quincy, Florida became the richest town per capita due to one man's shrewd business acumen and taste for fizzy drinks.

The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

Former wax museum from the 1960s, home to many wax U.S. Presidents and the famous White House miniature.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

One of the last of the great 1920s movie palaces is a Floridian Greco-Spanish-Persian dreamscape.

A historic presidential getaway on the continental United States' southernmost island.