The oldest operating pharmacy in the world features 800-year-old recipes.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

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

It houses the remains of a 17th-century version of the Titanic.

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

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

The widest natural waterfall in Estonia is a sight to see in all seasons.

Relics from an era long gone, sit idle outside this Estonian museum.

This enormous censer uses a pulley system installed over 400 years ago.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

Giant topiary dog once played a role in a terrorist bomb plot.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”