These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

The eccentric midcentury home of a suspected mafia gun-runner.

The first full-scale tunnel built in America is short but scenic.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

Production site for handmade clay bricks.

The last gas works in England and Wales details how people once extracted the resource from coal.

The site of one of the largest prison escapes of World War II.

Every year, the town of Menton, France, turns lemons and oranges into giant sculptures depicting windmills, dragons, and more.

Cathedral-like Victorian vaults are hidden within this iconic bridge.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Dozens of elegant ceramic tiles decorate these ancient walls, each displaying the Lord's Prayer in a different language.

One of the oldest, well-preserved water treatment facilities in all of Europe.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

A giant interactive periodic table with real samples of the elements.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A bus with a butt and biceps to put Olympic athletes to shame.

Looming communist pillar with a Czech twist.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A series of playful yellow penguins share a serious message about the environment.

A saintly relic hidden in a Prague church basement.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

An Orwellian sculpture with eyeball cameras watches passersby.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.