This 15-story mural celebrates the 50th anniversary of the musician's iconic "At Folsom Prison" album.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

One of the most historical literary characters continues to stroll his hometown.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

Hidden in the garden of physicist Erwin Schrödinger's house is a life-size figure of a cat from his famous thought experiment.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

A freedman baker’s lavish tomb has a relief showing various stages of Roman bread making.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

An alchemist's “magic door” stands in the middle of a Roman park.

The "dragon babies" of southeastern Europe.

Apartment complexes built into huge repurposed natural gas tanks.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

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

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

One of the most iconic neon ads of former East Germany.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

One of the oldest bridges in Norwich was used during the English witch trials and is said to be haunted.

A 16th-century footpath said to be haunted by a young girl that died trapped within its misshapen old house.

This imprint of an old computer keyboard has a unique backstory.

Be on the lookout for the symbolic insect all over the city.

The name of this suspended sculpture is Latin for "high horse," which is exactly what it is.

This neon sign is an homage to an Alfred Hitchcock film.