Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

Inspired by a piece of concrete, these three pyramid-shaped buildings have been beloved Indianapolis landmarks for over 50 years.

This strange example of the Egyptian Revival architecture trend now holds Mardi Gras floats.

This Garden District mansion was built to be bigger and grander than its original owner's former partner turned rival.

A little piece of Paris in the sultry south of the U.S.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

It's clear this abandoned Art Deco gem was no ordinary cleaners.

This Birdsill Holly fire hydrant is the remnant of a very different type of hydration innovation.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

The oldest lawn bowling club in the United States.

An open-air museum exhibiting a total of 52 century-old buildings, recreating Hokkaido’s “pioneer village.”

The world's shortest escalator doesn't seem to have any reason to exist other than to hold a world record.

Passengers are not allowed to set foot outside this station, but you can still enjoy spectacular views of the sea from the platform.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

This scenic waterfront swimming pool is the longest salt water pool in North America.

A clear blue swimming hole with hidden caves, still unexplored.

Beneath unsuspecting visitors feet, a capsule containing pieces of America’s civil rights history.

The young Black revolutionary was killed before getting to see a non-segregated pool in his hometown.