Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

San Francisco's newly reopened hands-on science museum.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Museum preserving torture methods from the past.

Climb inside an iron crystal magnified 165 billion times its normal size.

The celebrated eyesore created by starry-eyed sweethearts.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This massive redwood tree has a hole in the base big enough to drive through.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A wall of chewing gum moonlights as collective art.

A smoke stack so large, the Washington Monument could fit inside!

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.