This museum covers 10,000 years of Pre-Columbian Latin American history.

It's just another skyscraper, but it's shaped like '90s cell phone.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Purdue students would lean over this iron fence to skirt campus rules against smoking and courting.

Walk in the footsteps of the famed astronaut at Purdue University.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

This church on a Tohono O'Odham reservation has stood since 1797.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A former department store turned into a quirky restaurant.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

A spiritual vortex among the red rocks in Sedona.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

See massive fossils that are over 200 million years old in northeastern Arizona.