135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

Paris' linguistic guide to the international language of, yes, love.

A subterranean shelter remains intact under a busy Paris railway station.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

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

Noirish green neon marks the location of one of the oldest private detective agencies in France.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.