Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

The fragmented remains of a massive public bath connected to the city's water supply.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Incredible labyrinth of man made caves.

A beautiful maze marks where three countries meet.

The tallest mountain in mainland Netherlands isn't actually very tall.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

This chimerical bridge/tunnel appears to dead end right into the sea.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Copenhagen's celebrated theme park and gardens.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

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.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.