A relic of the Cold War in Chicago.

This former cannon foundry and castle for the Counts of Flanders is now a public garden.

This monument is dedicated to those lost on June 6, 1944, in the town with that day’s highest per-capita casualty rate.

Many generations of travelers have passed through the steep, smooth walls of this canyon.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

The unusual patterns in this rock formation result from two distinct modes of weathering.

During its heyday, 72 one-ton buckets from this dredge bore into the Powder River excavating vast gold deposits.

At the base of Steens Mountain resides an otherworldly desert.

An ADA-accessible trail and deck offering stunning views of Colorado’s Mount of the Holy Cross.

A unique arch graces the Dolores River Canyon near the Hanging Flume.

Two creeks flow out of either end of this canyon in opposite directions.

A river runs through this remote valley in a very unexpected way.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

People come from across the globe to swim in this lake believed to have healing properties.

This spectacular track has run continuously since 1882.

The colossal cartoon man stands outside a Nevada museum.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

The site of an underground detonation of a megaton nuclear bomb in the middle of the Mojave Desert.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

Thousands of acres of beautiful wild landscape in the Great Basin.

A Nevada mining boomtown that ran out of silver and luck.