More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

Experience the glam side of air travel without leaving the ground at this speakeasy.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

A tiny, heartwarming piece of art hiding in plain sight.

Modern megaliths form this work of cosmic, Celtic landscape art.

A doctor had this large tub carved into rocks to facilitate easier seawater bathing.

The carved medieval stones stand near the ruined abbey's parking lot.

The first plantation museum in the United States to focus on the lives of enslaved people.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

Rome's ancient Etruscan rival, now a park full of ruins.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

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

Architectureal fantasy quarter of Rome.

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

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

The oldest original lighthouse in Alaska that was born out of a tragic shipwreck.

Alaska Natives have lived on this tiny isolated island in the Bering Strait for over 5,000 years.

Often mistaken for an office building, inside this venue is an amazing collection of Native Alaskan art.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

The simple log cabin of a famed loner and naturalist stands preserved as a symbol of the ultimate DIY lifestyle.

America's smallest "national forest" has only 33 trees.