This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

Home to one of the world’s largest collections of model yachts.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

A miniature view of the park, caught in time.

These subterranean storage areas hold emergency water reserves.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This natural wonder is disappearing at an alarming rate.

The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.

A centuries-old church stands as a testament to Boston's "father of architecture."

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

Historic Hull Street was actually the first street with a proper name in the Boston area.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

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

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

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