Visible below the waves are memorials to the city's Gold Rush dead.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

When ecosystems collide in the arid Southwest.

Less a museum than a bizarre fantasy world created by artists and engineers.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

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

The second oldest continuously operating bar in Louisiana.

The ghostly remains of an accidental sea.

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

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

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

The world's longest known cave system.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The first declared National Monument in the United States.

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

A museum dedicated to the history and exploration of both popular music and science fiction.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

A bizarre house filled with an astounding array of collections.

Dramatic river bend surrounds a natural red-rocked pedestal.