A tunnel with windows, so you don't miss out on the impressive views.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

Enjoy the cutest cafe experience outdoors.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Beneath its placid surface, one of New York City's primary sources of drinking water hides a haunted past.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

One man's swirling six-acre monument of stone.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

Time has stopped at the house where Gandhi died.

A startling, centuries-old subterranean marvel hides in plain sight.

A blooming house of worship for the masses.

Nestled among the artifacts of the National Crafts Museum, this hidden gem offers hard-to-find regional foods from all over India.

A huge museum of much more than just agriculture displayed in a princess's palace.

Over the dunes of the Empty Quarter, the mysterious music of the desert.

A 3,000 acre historic oasis and farm in the middle of the UAE's "Green City".

You’ll never see the sky the same way after visiting this art installation in Tempe.

This Transylvanian church has changed its denomination four times.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This sculpture used famed boxer Joe Louis as the inspiration behind its body.

Romania's triumphal arch looks out over Bucharest.