Boats and fish both find their way through this massive hydroelectric structure.

Along with used instruments, this pawn shop has pieces of music history on display.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

One of the most comprehensive collections of historic Native American culture in the country reframes artifacts as artwork.

Tiny horses tethered to antique rings are scattered around the city.

This historic Victorian hotel has a scandalous history of affairs and murder.

The narrowest street in Canada was once a spot for dastardly doings, now a historic piece of Chinatown.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Amsterdam's former hotspot for public executions and dissections.

A public urinal so pretty, it was declared a national monument.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A floating cat sanctuary on an Amsterdam canal.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

An architectural oddity hides in plain sight on this iconic London bridge.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.