For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

This quirky piece of naval artillery has been deafening Canadians for over a century.

These abandoned coal mine towers near Sherwood Forest might soon boast the U.K.’s longest zip-line.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

This historic hydroelectric power plant in Japan has been preserved and is open to the public.

This 19th century hydroelectric powerhouse was the first of its kind.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

A place for ship-lovers to watch the passage of freighters traversing the Great Lakes while learning about their history.

The drama of nature in full effect in this Nevada State Park.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

A brick-paved former section of the historic coast-to-coast highway.

One of the last doorless, continuously moving elevators still in use in the U.K.

A bit of retro transportation flair preserved in the world's largest department store.

After a long, dark winter in the upper latitudes, Yellowknife knows how to let it all out in unparalleled style.

The world's largest collection of preserved trolleybuses.

These stairs were built to accommodate royals mounted on elephants.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

One woman's dream became a train hotel in her backyard.

This pair of Australian "waterfalls" appear to be falling straight across the land.