This unique Lady Liberty is one of the only examples of the figure sitting down.

The library's graceful rotunda is like a bibliophile's temple.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Stockholm's tiniest statue is of a small boy looking at the Moon.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's narrowest alley is barely over two feet wide.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

A marvel of Byzantine engineering under the streets of Istanbul.

The most metal church of all time was built in record time because of an international, pious pissing contest.

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.