Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

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

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

France's most famous cemetery, with some of its most curious tombs.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

An art world insider finds himself battling for his artistic home.

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

Despite centuries of architectural innovation, this French castle is being built like it's the 13th century.

A quaint medieval harbour where Benjamin Franklin landed in 1776.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

If they push on just the right spot, even the weakest person can move this titanic boulder.

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

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Week-long block party becomes a competition for the best decorated street.

An early 20th-century bullring converted into a modern shopping center.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

This Parisian gem is one of the most incredible ethnographic museums in the world.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

This former industrial site has transformed into a community sculpture garden that hosts monthly Full Moon parties.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.