"The Donut" was built as part of an expensive, ill-fated engineering endeavor.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Some of England's last cave dwellers lived and worked within this huge cave.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

This quirky piece of naval artillery has been deafening Canadians for over a century.

An enigmatic modern marker left next to a historic Roman site.

The "Gateway to the Arctic" connects Barrow's indigenous population with the sea and its traditional industry: whaling.

A distillery built on (and above!) mobster Dutch Schultz's Prohibition-era underground moonshine business.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

A collection of 4,000 thimbles that's more versatile than one might imagine.

The ruins of this prominent glass factory yield hidden treasures buried among the jungle floor.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

A library where thousands of books explain how to avoid another Great Recession.

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.

A park built around the legend of a clam-loving giant who created a monumental midden.

Only electricity pylon built over two lanes of traffic.

The traditional houses along the coast of this charming Japanese fishing village allow people to sleep above the sea.

The iconic castle that withstood a magnitude 6.2 earthquake has become a symbol of resilience.

A 14th-century European chapel sticks out of the facade of a Japanese hotel.

Turn around and stick your head between your legs for the best view of this tree-covered sandbar.

A massive wintry wall of snow up to 66 feet tall flanks a highway through Japan's mountains.

A sobering scientific reminder of the human damage caused by the advent of the nuclear age.