Cpeper's User Profile - Atlas Obscura
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Sequoia National Park, California

General Sherman

Quite simply the largest tree in the world (by volume).
Colorado Springs, Colorado

Garden of the Gods

Strange red rock formations that have been attributed to a higher power for hundreds of years.
Los Angeles, California

La Brea Tar Pits Dragonfly Fossils

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.
Indianapolis, Indiana

Market Street Catacombs

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.
Carlsbad, New Mexico

Carlsbad Caverns

Second largest cave chamber in the world, discovered in 1898 by a sixteen year old and his friend known as "pothead."
Mammoth Cave, Kentucky

Mammoth Cave

World's longest known cave.
Yellowstone National Park, Wyoming

Grand Prismatic Spring

The largest hot spring in the US is, as the name suggests, a stunning show of natural color.
Yellowstone National Park, Wyoming

Morning Glory Pool

A beautiful geyser under environmental threat.
Chicago, Illinois

Willis Tower Glass Platform

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.
Devils Tower, Wyoming

Devils Tower

The first declared National Monument in the United States.
Mesa Verde National Park, Colorado

Mesa Verde National Park

The ancient dwellings of the Puebloans, carved into the cliffs of majestic mesas.
San Francisco, California

Alcatraz Island

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.