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

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

The first of the iconic American roadside attractions lives on as a college mascot.

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

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A geological mystery on Camelback Mountain.

Millions of years of erosion created the feature for which this rock formation is aptly named.

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

A Norman-style castle, 1850s Irish cottage, and cultural center in the heart of Phoenix.

Artifacts from a battleship sunk at Pearl Harbor displayed in the Capitol building of its namesake.

A self-built castle made by a mysterious man.

This limestone Temple Ornament was created from the relics of St. Mary's Chapel

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Legend has it that Bishop Oliver King dreamed of angels ascending to heaven and ordered the church's reconstruction in the late 1400s

The accidental discovery of this gilt bronze head led archaeologists to find the Roman Baths in the city of Bath

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

One of the largest objects salvaged from the famous sunken passenger ship.