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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Most-visited and most-photographed slot canyon in the American Southwest.

A sculpture for the sun and stars, created by Nancy Holt.

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

An homage to everyone's favorite prehistoric cartoon family.

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

The ghostly remains of an accidental sea.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Remains of a Greek freighter trapped off of Rocky Point in 1961.

America's most famous piece of self-built architecture.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

The last Americana on Route 66.

Bug-devouring flora are the stars of a special wing of the glass conservatory.

A monument to the love people have for their pets.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A hidden subterranean installation offers a view of the sky.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

Olfactory delights in San Francisco's Botanical Gardens.

San Francisco's newly reopened hands-on science museum.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.