The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

A striking 12th-century-style castle built on the edge of a cliff.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Amazingly, this old machine within the Resorts Casino still functions.

With over 10,000 lights, this engineering marvel lights up the city after dark.

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

Unusual building appears to be haphazardly built from randomly piled bricks.

A 1:2 billion-scale solar system leads visitors into this German university town.

The Goose Girl of Göttingen, Germany might well be the most kissed girl in the world.

Christ's blood allegedly preserved in a Belgian town.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

A man throwing a giant severed hand towers over Antwerp’s main square.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

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

The first skyscraper to include a Ferris wheel built into the facade.

Fast food feels like fine dining at this award-winning modern Georgian building.

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

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.