Places athenaeum88 Wants to Go

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Rippling sand dunes frozen in the Arizona rock.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

A wonderland of caves in eastern Iowa.

An underground wonderland in Iowa.

A lush green oasis in the middle of Chicago.

Beside a busy highway, a colony of Great Blue Herons raises hundreds of offspring each year.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

The largest ancient burial mound in Ohio.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Faces carved into the cliffs create an otherworldly walking trail.

Take a drunken tour inside the world's largest known geode.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

One man's vision and a labor of love of many.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

This prehistoric karst cave is situated near a working ranch and historic warm springs.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.

Where a guard killed nine German prisoners during one of the worst 20th-century POW camp massacres in U.S. history.

The damming of the Colorado River buried an iconic geologic formation before record-breaking drought brought it back.