This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

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

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Hear the quietest sound from across the dome.

Quite simply the largest tree in the world (by volume).

Famously misunderstood wonder of the ancient world

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The sign at the garden gate reads: “These Plants Can Kill.”

Macabre astrological automaton clock dating to the late 1400s.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Eighty million natural history specimens call this gargantuan museum home.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The world’s first penitentiary, meant to be humane, drove men insane.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.