Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The London statue that imitates passersby.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

This hidden green space is the city's second largest conservatory.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A piece of the iconic wall found an unlikely new home in a Vegas bathroom.

Norway has built what may be the world's most beautiful public toilet.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

If your school was decorated with trippy graffiti, served ambrosial coffee, and was frequented by mimes, it might have been similar to this groovy cafe.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

A tribute to all the green-thumbed workers who tend London’s public parks and gardens.

The fences outside some of South London's estates are made from recycled World War II stretchers.

An architectural oddity hides in plain sight on this iconic London bridge.

A measuring mishap led to these artificial stone ladies losing their stomachs.