Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

Started as a kitchen garden, now the second largest botanical garden in the world.

A public display of random paleontology.

A natural wonder in south Denmark.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Natural rock water slides hidden in the remote forests of northern Idaho.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

Take a monster truck tour around an ostrich farm in the middle of the desert.

A natural history wunderkammer in the middle of the desert.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.