This giant mimetic milk bottle has encouraged Route 66 travelers to choose dairy since 1948.

Claims to be the "World's Highest Hill."

This little slice of old Jerusalem in Oklahoma is the evolution of a century-old passion play.

This road earned its macabre nickname after hundreds of Iraqi troops died along it in 1991.

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

This impressive castle looms over small German town.

Remnants of a cone-shaped Nazi bomb shelter.

An old slaughterhouse now holds the largest collection of pig artifacts.

A stunning two-story timepiece within a medieval Brick Gothic church.

This old wooden funicular railway leads to a cemetery in the forest.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Once the home of a hermetic monk, this cave now houses a small church.

Baroque celebration of the end of the Great Plague of Vienna.

This unique landscape is the only place in the world to dig for hourglass-selenite crystals.

This unusually circular centenarian barn became a Route 66 icon.

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

A peculiar forest that was handcrafted for government experiments.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

This 19th-century windmill was moved, stone by stone, in the middle of Kansas.