Elevated freight railway turned wildly successful urban park.

Apartment complexes built into huge repurposed natural gas tanks.

This former coal gasification plant found a curious second life as a popular public park.

Camels and crocodiles share the black waters of this stunning Saharan oasis.

This isolated island is often capped by its own fluffy cloud.

A misunderstanding gave this 18th-century racehorse a most amusing name.

This remarkably well-preserved mosque stands amid an 11th-century caravansary.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

The main gates have been locked since 1745 and will remain so until the Stuart Dynasty returns to the throne.

Remnants of the Nazis' occupation of Denmark linger along the sand.

This hill is known for its connection to the occult in Slavic tradition.

A 14th century castle built on the seat of a mighty giant.

A serene temple with stunning stained glass hides in downtown Dallas.

This "living building" on Georgia Tech's campus is home to a blueberry orchard, honeybees, and more than 900 solar panels.

Yup, that's a 330-foot yacht passing over the highway.

A historic holy well hidden near a charming English park.

This marvelous work of outsider architecture is built into the cliffs of an Israeli beach.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

The massive steel ring looks like it could be China’s first Stargate.

The highest tropical mountain range in the world is in Central Peru, home to a vast array of exotic and quirky plants and animals.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

An ancient burial ground believed to have been used for ritual sacrifice.