Former bridge turned into an observation tower.

Depending on how it is measured, this lighthouse can claim to be the tallest in Europe and the tallest conventional lighthouse in the world.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

Third time's a charm, or in this case, two testicles are.

A small collection of objects of a bygone era hide in plain view.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Hundreds of hidden passageways weave through the old quarters of Lyon.

This saucy statue once caused outrage among locals.

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

A historic and beautiful Art Nouveau chamber in a historic railway station.

A mysterious suspended hand greets unsuspecting visitors at the Tower of London.

The largest and best-preserved rotunda in Prague.

This church was constructed on the site where St. Philip the Apostle preached to the ancient Athenians.

Explore the five senses depicted on this protruding Gothic window.

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

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

Browse through a century of this principality's first popular export.

This baroque palace displays an impressive collection of taxidermy, art, and rare objects from the days of courtly hunting.

A German apartment building hosting as many trees as human occupants.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.