A tiled, multi-level garden of survival in Lyon.

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

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

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

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This massive library holds what was once the largest book collection in the world.