The vast, legendary catacombs hold secrets much stranger than stacked bones.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

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

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

The Sun King's military models, saved from the Louvre.

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

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

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

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

What was once a bustling mining installation is now a bustling hub of contemporary art.

A lovely biographical museum in the artist's home of 24 years.

A giant bug impaled on a 75-foot-tall needle.

This heavily worn bas-relief was once an honored fertility symbol.

This interactive sculpture allows visitors to leave a message in case a friend passes by.

A collection of weird and wonderful art fills a former houseplant nursery.

A Museum of Psychiatry in a still-operating mental institution.