The third tallest lighthouse in America once guided author Stephen Crane to safety.

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

Manatees congregate around a power plant's discharge canal where the water is especially warm.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

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

Meet manatees face-to-face at this zoo for native species.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The oldest military monument in the United States.

Baltimore's first skyscraper may be home to the inspiration behind pulp fiction's most celebrated bird.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A building so large that it has its own weather.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A reconstituted ancestral village of the Huron-Wendat Nation.

A historic Montreal market that was the city's agricultural hub for over century.

This grand Spanish-Cuban restaurant has been serving customers for more than a century.

A tiny, unassuming park in Tampa that belongs to the Republic of Cuba.

World's largest magnetic research facility.