The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

You can row a boat through this ancient underground reservoir.

The headquarters in Salem doubles as an occult art gallery.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A historic neighborhood church is reborn as a psychedelic arts collective.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

This grand gothic brewery has been pumping out suds for over a hundred years.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The Devil’s own choice when he needs a drink in Brussels.

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

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Statue of death tucked in the University of Medicine courtyard.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's most famous cemetery, with some of its most curious tombs.