This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

Four alabaster giants contemplate the tides on the shore of Denmark.

Artistic cabins actually grow deep in the Canadian wilderness.

A movable feast that is an East London institution.

This quirky countryside store is known for the goats that hang out and eat the grass on its roof.

An unused hyberbolic electricity pylon kept as architectural monument.

A subterranean house of worship carved right out of the bedrock.

A Balinese resort, empty and trapped in time.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

Stained glass windows bathe this botanical garden in cosmic light.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

Statue of death tucked in the University of Medicine courtyard.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

An Aztec snake god has taken the material form of an apartment complex.

A beautiful Victorian-era cemetery, complete with a miniature village.

From scholastic to sepulchral - now under reconstruction.

Walled family complexes in Southern China.

A lake formed in the basin of a massive impact crater takes the shape of an unbroken ring when viewed from above.