A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

Despite being a perfectly pleasant place to be, Loyalton can't seem to attract any visitors.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

A beautiful geyser under environmental threat.

An architect's childhood fantasy treehouse made real.

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

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

Ancient human, animal, and geometric figures drawn in the earth.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

Semi-recognized center of the world, with many oddities.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

An off-grid art installation that encourages its visitors to imagine a world without waste.

A hand-built folk art installation covered with messages of God's love.

Erroneously called the world's tallest flagpole, this landmark is devoted to "good neighborliness."

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

World's largest collection devoted to one fruit.

A museum dedicated to a sea that should have never been.

The ghostly remains of an accidental sea.

Along a California highway is a kind of Jurassic Park made of metal.

A monument to a one-legged kidnapper, horse thief, and charlatan asks visitors to throw rocks in a pile.

Catch a glimpse of the elusive Peninsular bighorns right off of the desert freeway.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.