Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

New London, Connecticut still holds a grudge against its hometown son who turned traitor and burned the city.

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

Abandoned railway line circling the city of Paris.

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

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

The homestead of American patriot John Adams.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Underground tunnels remain beneath this abandoned mental asylum.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

Hiding the longest subterranean river known in the world.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.