A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Here’s how Robert the Doll earned his reputation as the most haunted doll in the world.

A remote crossroads honoring a fallen talent.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A relic of roadside lore and perhaps the first of its kind in North America.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

The first declared National Monument in the United States.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Four hundred granite steps were built into this massive rock by the National Park Service.

Deep vertical fissures like miniature slot canyons cut across the cemented volcanic rock of Black Point above Mono Lake.

This large chunk of dark rock is a relic from an ancient volcanic eruption.

A volcanic cone that formed over 600 years ago.

A relic of the region's once booming timber industry.

For decades, the largest tungsten producer in the U.S. was located in a spectacular setting in the high Sierra Nevada, with some of the workings over 11,000 feet.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

The first lookout in Yosemite.

A natural dome made of volcanic glass in Inyo National Forest.

Towering basalt columns, a creation of fire and ice.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.