The vast, legendary catacombs hold secrets much stranger than stacked bones.

The history and future of cannabis.

A trading post in the North Pole where children send letters.

One woman's dream became a train hotel in her backyard.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

The only road through the heart of Glacier National Park.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

New fungal and bacterial species call this deadly lake home.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

This amazingly preserved Gold Rush town is a historian's dream.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

One part antique store, one part curiosities hodge-podge.

This failed condo development was reborn as a street art hub.

San Antonio's first 3-D stereoscopic mural is a trippy treat for the eyes.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

These boots are made for selfies.

Ruins of a once-opulent grand Victorian resort.

The summer home of the largest colony of bats in the world.