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

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

This uninhabited volcanic island is the most remote in the world.

The world's northernmost aquarium looks like it has fallen over.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

Walk behind a 50-meter-high waterfall.

An intricately carved Viking church overlooks a glistening fjord.

The world's northernmost ice hotel.

The avant-garde design was able to bypass strict Soviet regulations on architecture.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

Triangular House built on a leafy residential street in St. Paul.

An architect's childhood fantasy treehouse made real.

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

One man's ambition created this psychedelic log home.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The first declared National Monument in the United States.

A beautiful geyser under environmental threat.

Wisconsin's most celebrated export gets the royal treatment on I-94.

This cave holds a surprisingly colorful variety of geological oddities.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.