A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This small, but long-running hobby club has built one of the largest model rail lines in the US.

An enormous park-like oasis, full of famous Chicagoans' graves.

A lush green oasis in the middle of Chicago.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

These abandoned grain silos and tunnels are an urban exploration dream.

A stunning landscape of bunkers that once stored chemical weapons.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

A hidden gem of a saloon in the middle of a ghost town.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

An ill-fated attempt to grow wheat in the sagebrush steppe of northeastern Nevada.

An improbable waterfall springs from an orange-white cliff face, tumbling into the headwaters of the Virgin River above Zion National Park.

Thousands of years ago, Indigenous people painted images onto these canyon walls that are still on display today, provocative, mysterious, and enduring reminders of the people who lived here long ago.

This roadside stop between Goblin Valley is the perfect location to view some of the region's natural wonders.

The unusual patterns in this rock formation result from two distinct modes of weathering.

An empty mine that some believe will suddenly be filled with fortune and treasures at the end of the world.

A quirky old tree covered in tokens, cans, and bottles of wishes.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.