The tiny, studious rodents greet visitors to the National Archives of Finland.

An alien church provides much needed silence in the midst of a Finland shopping center.

This ten-ton fruit sculpture celebrates the Finland homeland.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

An abandoned underground bathroom is now a space for public art.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

Twisted buildings adorn the banks of the Rhine river.

A subterranean house of worship carved right out of the bedrock.

An electrical pylon under whose legs a normal gauge train can run.

This futuristic German television spire is actually the world's largest digital clock.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The remnants of a facade from a 19th-century market stall emporium.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Also known as "Hell Alley," this tiny street in Imola gained its name in a bloody episode in the 16th-century.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.