In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Legends surround an ancient tree trunk riddled with nails for good luck.

Museum devoted to the artificial language of Esperanto.

Handsomely crafted representations of our round planet.

The beautiful baroque library of the Hapsburg empire.

A unique blue and yellow phone booth in America's "Little Sweden."

This historic early-20th-century building still boasts some of its original features.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

A museum chronicling pioneer life constructed over Interstate 80.

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

A spiritual vortex among the red rocks in Sedona.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Community bookshelf of 25-foot-tall book spines.

This beautiful and unmissable little museum is full of fascinating artifacts from Mesoamerica's great civilizations.

These flying foxes dangle from the trees around the library like fuzzy black fruit.

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.