At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

A hands-on traveling collection of the innovative devices of yesteryear.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

A Milanese café entirely designed by the American director Wes Anderson.

This giant wooden treehouse within a sprawling garden has its own eatery.

The ornate miniature mansions were built for Istanbul's feathered residents.

A meow-velous tribute to a beloved street cat, made famous on the internet.

The remains of Crystal Palace Great Exhibition of 1851.

Abstract dinosaur models in London.

A Jewish deli run by Yemeni Muslims in an Afro-Caribbean neighborhood is quintessential Brooklyn.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The last slot car racing arcade in Brooklyn is keeping the dream of speedy little autos alive.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

What's a diner from the 1939 World's Fair doing in a remote Utah mountain town?

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

A charming flea market shop dedicated to retrofuturistic apparati.

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

A 16th-century horror show built in a lovely Italian garden.