The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

The World's Largest Bull.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

This famous city eluded concrete detection until the early 2000's.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

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

The oldest continuously operating fish market in the United States.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

This bridge was constructed from the rubble of the infamous Bastille.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

When ecosystems collide in the arid Southwest.

The largest source of fossilized insects anywhere.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

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

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Legends surround this jagged rock formation in the New Mexico desert.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.