This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Rare recess caves fill this unbelievably beautiful Ohio park.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

20,000 pieces in a Frank Gehry-designed building.

One of two giant blue cockerel statues erected with an intentional double meaning.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

The only arched bridge made of stone on the entire Mississippi River.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

When flour explodes, it's not a pretty sight.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

See the sky in a new way through this art installation.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

Crumbling hotel echoes with the sounds of the '30s.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

An architect's childhood fantasy treehouse made real.

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

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

A beautiful geyser under environmental threat.

An urban laboratory.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.