Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Macabre astrological automaton clock dating to the late 1400s.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

An aptly-named street near the birthplace of the modern LGBT rights movement.

This unusual building straddles two countries.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Erotic art covers the walls of the largest ancient pleasure palace.

The walls and streets of the ancient city are peppered with penises.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Tucked away amidst some of the most famous addresses in the world is New York’s only fraction of a street.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This whimsical fountain pays tribute to Toronto's four-legged friends.

Known as "Toronto's Flatiron."

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

The world's smallest drawbridge.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

An encyclopedic collection of mammal penises.