This ancient theater was once the home of fierce gladiatorial battles.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

The encased skull that is widely believed to belong to St. John the Baptist.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

There has been an astronomical clock on this spot since the 14th century.

The world's tallest bridge is also possibly the most elegant.

A chapel on a volcanic core, marking the end of a successful journey.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

Museum in a swimming pool where the water still flows.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

The world's largest reflecting pool is just two centimeters deep.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

The famous winding walk at Chartres is surrounded in mystery and myth.