This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

Memorializing an American tragedy of massive proportions.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

World's second largest particle accelerator, where nature reveals its secrets.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The final resting place of the great navigator, or maybe his brother.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The glowing blue Nymphaeum of Emperor Tiberius.

Drink a Guinness under the wings of Reagan's retired Air Force One in his presidential library.

A second generation sun-powered marvel lights up the night.

Only hotel where you can legally launder money.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

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.