In between two buildings in Ljubljana, medieval tunnel to nowhere.

A public work of art that also provides some relief from the summer heat.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

Strange rumors surround the artist who created these solemn metal guard dogs.

Nibble as you learn about Slovenia's longstanding tradition of making beautiful honey cookies.

On a small Slovenian island, diners can mix and match a classic cake into dozens of sweet and savory flavor combinations.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

This building contains a door only used by members of the royal family.

Near the site where the English Archbishop was born, you can find an emblem in the shape of a pilgrim's badge.

The unfinished final resting place of some of Spain's most prominent politicians.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

This postmodern apartment block was designed to be a vertical neighborhood.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

A lush indoor jungle fills this bustling Madrid transportation hub.

A forest park outside Tallinn full of architectural and artistic curiosities.

A giant gorilla made of used car tires used to sit sentinel over a Helsinki college campus.

Hundreds of signs pointing to the birthplaces of current Helsinki residents form stalactites on the ceiling of the cave-like Kamppi metro station.

One of the oldest structures in Helsinki is this burrow grave that dates back to the Bronze Age.

Atop this electronic store resides a massive fighter jet.

This former hospital was once one of the oldest mental health facilities in Europe.

This building featuring Brutalist architecture has a rich media production history.

On a small island, a replica of a Finnish village from the Iron Age.