This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

The world's largest military aircraft cemetery.

America's only nuclear missile silo open to the public.

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

An urban laboratory.

This impressive Boston holy house is the American mecca for Christian scientists.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A tunnel of hardened lava along Maui’s famous Road to Hana.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

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

These free-roaming horses were once destined to disappear from the land.

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.

Ancient pueblos built into the base of a natural canyon wall.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

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

A spiritual vortex among the red rocks in Sedona.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.