A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

The celebrated eyesore created by starry-eyed sweethearts.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

Dedicated to the history and culture of smoking, this small museum now includes a vape lounge.

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

The Argonaute submarine was the French navy's pride and joy in the 1950's.

The historic Masonic Lodge in which the first-ever female Mason was initiated.

This bridge was constructed from the rubble of the infamous Bastille.

A curious collection of locks and keys.

The personal library of the founder of modern neurology is open to visitors.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

An unusual number plate signifies the building's saucy past.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

One of the oldest masonic museums in Paris.

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

BDSM, 1930s Style.

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

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.

Saintly bones pressed into a wax effigy of a Catholic superstar.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

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

Got apples?

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.