The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

This museum dedicated to the famous comedy duo is located in the town where Stan Laurel was born.

At this ancient settlement at the foot of Mount Babadağ, honeycomb tombs are carved into a round cliff.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

A vault of safe-deposit boxes in an old bank has been repurposed as a time capsule of Hispanic culture.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

One of the oldest seagoing boats in the world can be found at the Dover Museum.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

A total of 14 men held the title of "president" before George Washington—their historical legacies are enshrined in the lobby of a hotel.

This Roman underground canal was the longest tunnel ever built until the late 19th-century.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

This free, take-a-book shop seems like a trick but isn't.

The trials and tribulations of marking Poe's grave.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

One of the world’s longest pedestrian suspension bridges.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This lovely tree was a thank you gift from the man known as "Public Enemy No.1."

A bizarre house filled with an astounding array of collections.

The oldest active mini golf course in the U.S. has an elegant Art Deco style filled with lush tropical plants.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

The Arctic Archipelago is home to world's largest third order island: an island in a lake on an island in a lake on an island.

A five-story homage to tea times past.

The country home of world-famous designer, writer, and artist extraordinaire, William Morris.