Activity

9 Places

San Diego, California

Sunny Jim Cave Store

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

San Diego County, California

Goat Canyon Trestle

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

Rachel

Added by Rachel

McMath-Pierce Solar Telescope

The biggest solar telescope in the world helps reveal the secrets of our sun.

Trevor

Added by Trevor

Salt River Wild Horses

These free-roaming horses were once destined to disappear from the land.

Added by jdurand26

Roosevelt, Arizona

Tonto National Monument Upper Cliff Dwelling

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Added by adyban07

Winterhaven, California

Valley of the Names

Since World War II people have been decorating this stretch of the Yuma desert with signatures arranged out of rocks.

kcmick

Added by kcmick

Tucson, Arizona

Richard F. Caris Mirror Laboratory

Giant telescope mirrors built in a spinning furnace under a college football stadium.

cyccommute

Added by cyccommute

Mission Viejo, California

Oso Creek Fairy Trail

This beautiful ridge-top trail is dotted by tiny homes apparently built by a group of itinerant fairies.

Added by Salamandre

Irvine, California

Orange Balloon

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

Added by rosalbre