A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

Visit Europe's largest subterranean waterfall, carved by water from the glaciers of the towering peaks surrounding the valley.

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

Try not to get slimed in Tribeca.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This bridge was constructed from the rubble of the infamous Bastille.

Renaissance villa and gardens complete with a tormented colossus.

A market built atop boats is one of the few floating holiday markets in Europe.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Lavish royal estate punctuated with heated greenhouses.

400-year-old garden, restored to beauty.

With over 10,000 lights, this engineering marvel lights up the city after dark.

New York City's only radical feminist independent bookstore.

In Lago Superiore, the largest expanse of lotus flowers outside of Asia is hard to miss.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

Above an abandoned Underground station, this charming bookstore is home to strange antiquities and literary works.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Hidden deep in a forest is this geological wonder carved by glaciers.

A little slice of Japan and its aesthetics in London's Holland Park.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."