Pilgrimage site for star-crossed lovers.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Water and windows define this defensive Italian well.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A small world of mechanical magic and metal merry-go-rounds in a Outsider art Museum.

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

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

The man who introduced reinforced concrete to the world demonstrated its genius by using it to build his own house.

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

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

One of the world's most complex timepieces.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

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

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.