This spectacular track has run continuously since 1882.

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

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

Spectacular views await visitors to this lake.

This amazingly preserved Gold Rush town is a historian's dream.

Natural rock water slides hidden in the remote forests of northern Idaho.

Celebrate Earth Day with a menagerie of vibrant, artistic animal costumes.

Once a year, thousands of naked cyclists flood the streets of a Seattle neighborhood.

Stroll through a wonderland of stupendous moss-covered trees.

Inside a humble hangar is some of the best roller derby the world has to offer.

Hollowed out cedar log tubs set in an ancient towering forest.

This frequently-photographed waterfall takes only a short hike to visit.

The sprawling attraction boasts a collection of more than 150 historic wagons.

This unique competition celebrates an American Indian and Canadian First Nation cultural tradition.

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

The farthest you can be in the contiguous U.S. from a McDonald's location.

This childhood throwback has hundreds of arcade games and pinball machines to transport you back in time.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

Spend a day hanging out with domesticated Russian foxes.

Antiques by the Bay.

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.