Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

The palace of the King of Kings, burned by Alexander the Great.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

This is not your typical jungle gym.

A towering Art Deco movie palace made to look like a Mayan temple.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

World's second largest particle accelerator, where nature reveals its secrets.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

The beloved home to all publications indie, erotic, and punky.

A hot dog stand where the heads are just as hot as the dogs.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Belly up to the bar in Cowtown, don't forget to buy some boots.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Meet the world's longest tapeworm in a collection that really gets under your skin.

Not quite the menace it once was, this monster still has some chops.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A science teacher's dream.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.