Abandoned mini-mansions that were once intended for affluent Bangkok families now sit empty.

A three-table eatery sits inside the home-kitchen of a seafood virtuoso in Bangkok's Chinatown.

At a Bangkok bistro, one pot of beef stew has been cooking non-stop for more than 45 years.

Final resting place of the most prolific Fijian cannibal of all time.

This fine-dining restaurant features native New Zealand ingredients and Māori cooking.

Inside a former cabaret, seven floors of erotic art.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

The narrowest street in Paris.

This banal Parisian entranceway is not what it seems.

A modern-day Lascaux cave underneath Paris.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

France's national museum of scientific and industrial instruments.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

The oldest stone house in Paris was built by its most famous alchemist.