A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A 19th-century artistocrat's mansion, turned into a library, hidden in a modern library.

This sculpture honors the man who was known as the "Righteous Among the Nations."

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A Hungarian pharmacy museum with a box full of mummy powder.

The true meaning behind this sculpture remains unknown.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A museum in the childhood house of a medical pioneer.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

A 26-foot shark sculpture—a statement about bombs—set off a municipal battle royale.

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

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

A giant bug impaled on a 75-foot-tall needle.

A lovely biographical museum in the artist's home of 24 years.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

The patron saint of spinsters grasps a container of dried blood.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

The geoglyph once sported a glass bottle eye.

The accidental discovery of this gilt bronze head led archaeologists to find the Roman Baths in the city of Bath

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