Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.

Known as the leaning temple, the sacred structure has somehow developed a severe nine-degree slant.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

This old village lock-up is known as the "round house," but it is actually octagonal.

Follow the original medieval paths that wind through this intriguing section of the city.

The last street in Pittsburgh that's paved with wood.

A secret passageway from World War II is now a quirky pedestrian shortcut.

Built in the 1300s, this magnificent building that hosted England's kings and queens transports you to the Middle Ages.

The world's only bushplane museum captures the spirit of the early planes and pilots and their contributions to northern life in Canada.

Home to the world’s oldest seismograph and a four-ton steel ball that makes its own earthquakes.

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

Its impressive still-working beam engine is a thing of beauty for engineering history fans.

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

A stick-sprouting statue watching a duo of disembodied dancing deities.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

A giant repository of accidentally discovered cave paintings up to 30,000 years old.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

This small monument marks the divide between the Atlantic and Indian Oceans at the southernmost tip of Africa.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

Breathtaking Byzantine paintings cover the inside of this 12th-century church.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.