One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

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

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

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

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

The world's tallest statue of a woman wields the world's tallest sword and is at risk of toppling over.

This tower once served as a radar station during the Cold War.

These small, triangular, colorful houses are a staple of Madeira Island.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

A lush oasis full of vibrant plants and striking geometric displays.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

The floor of this spectacular Baroque sanctuary is covered in memento mori.