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

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

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

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Journey through the largest remaining peat bogs in the contiguous United States to see the wilderness as it once was.

Minnesota's highest point is a scenic vista marked by a plaque and armies of mosquitoes.

A riverside park built around the ruins of a massive dam that collapsed in 1909.

A stone face watches over the river.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

A mapping error in the 19th century made loggers think this section of the forest was underwater.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

When waves crash onto this section of beach, the rocks sing a song.

This large midwestern cavern features impressive rock formations and an underground waterfall.

Half of a waterfall goes into the river while the other half seems to disappear.

This scenic overlook commemorates the tragic death of a soon-to-be-married lumberjack.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

Hidden beneath the waters of Lake Michigan rests a perfectly intact ship from the early 1900s.