One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Elevated freight railway turned wildly successful urban park.

Plot your trip through the city on the sidewalk.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

A modern zoetrope on the New York City subway.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

One of the largest squares in Europe contains an entire artificial island.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Also known as the Cathedral of the Plains, this church holds the distinction of being one of the "8 Wonders of Kansas."

A whimsical bridge adorned with decorative dragons.

A hands-off space for graffiti artists to hone and display their skills.

Civil War Fort on an island in the Boston Harbor.

Hut with supplies for shipwreck survivors.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

The Adriatic's most famous wind can be reliably experienced in the city's Marina.

This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.