An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

A garden in Lisbon filled with giant porcelain creatures.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The corpse bride of Portugal.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

360° views of the city plus five floors of optical illusions and hands-on science.

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.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

A curious collection dedicated to human and animal anatomy and pathology.

The world's only museum devoted to the wonders of fluorescence.

Floating swimming pool within a moored vessel.

Where once there was a train station bathroom, there is now this German burger joint.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.