This tiny watering hole claims to have the smallest bar counter in Europe.

A 19th-century time capsule of travel, fiction, and historic texts still available to the public.

Rainbow-hued local gem in Venice.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A library and museum dedicated to typography.

Detailed facade of a brownstone in Boerum Hill.

Ride the subways of yesteryear.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

Home to a dizzying array of letterpress blocks with a rich history.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

These fantastically named natural pools look like something out of a Scottish myth.

The world's largest frame offers spectacular views of the city's past and present.

Walk 2,300 feet above the ground on the "Troll's Tongue."

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

Named for the DeFoe novel inspired by a stranded sailor, this island is known for its rare plants and extreme beauty.

Some claim these desert ruins are from the legendary "Atlantis of the Sands."

Groups of prehistoric tombs that dot the mountains of northern Oman.

This spectacular mosque houses the second-largest chandelier in the world.