This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

Unlike most arches, this geological oddity formed in a volcanic dike.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

This legendary dessert was served to Nobel laureates for decades.

The pharmacy's retro ice cream mixer is one of the last of its kind.

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

Entering this curiosity shop is like stepping into a mad scientist's lab.

A heavenly experience, right here on Terra Firma.

A beautiful 62-acre Catholic shrine and botanical garden.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Small shop offering mail-order rare and exotic plants.

The macabre paintings created by famous suicide proponent Jack Kevorkian, or "Dr. Death."

This decrepit abandoned building is made all the more eerie by its dark history.

This stone tower in a small town's graveyard looks as though it would be more at home in a fairy tale.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

A quaint museum nestled in a former hub of Irish moss harvesting.

The monumental steeple on Amherst College's campus has no church attached to it.

This beautiful architectural gem was the first waste treatment facility in Boston.

A daybeacon pyramid is about all that's left of this island that is said to have sunk due to a pirate's curse.

This donated headstone marks the grave of a pair of elderly women who were mysteriously murdered.

This old mill and former police station now present a world-class collection of Orthodox iconography.