If you dare to join a month-long expedition to 14,000 feet above sea-level, attempt Surviving Denali at www.pbs.org/wgbh/nova/denali . The best view is from the summit of the mountain in the Climb section. For a journey of this caliber, you'll need to brush up on your survival skills in the Mountain of Extremes section. Don't worry if you forgot your lunch. This site has a menu for keeping your energy level up. Climb sky high today.

Grab your spelunking helmet and crawl into the wonders of the underground. Spelunking is all about exploring caves, and The Virtual Cave Web site at www.goodearthgraphics
.com/virtcave has tons of dirt on caves. Check out the 40 rooms of solution caves with their amazing stalactite and stalagmite formations, and another 36 rooms of lava tube caves. The sea cave and erosional cave photos show the awesome power of nature in carving solid rock. Cave in and explore today.

The World of Oil examines one of Earth's main energy resources at www.priweb.org/ed/pgws . You'll learn about the pinhead-sized creatures that oil comes from and about Hydrocarbon Systems. Get down to Geology Basics and learn how the Rock Cycle shapes the Earth and creates volcanoes and earthquakes. Whether you're snapping photos, going for a jog or listening to music, you're using a product made from oil. Let knowledge about oil spring from the ground at this site.

Climb into The Caving Pages at www.cavesource.com . Getting Started is no problem once you have the necessary gear. You'll find pictures of different Types of Caves such as lava and ice. Houses, paintings and Cave Fragments tell the history of caves. Conservation efforts are under way to preserve caves from the effects of vandalism and deterioration over time so that they can be enjoyed by generations to come. Take this opportunity to learn about Caves Near You.

Glimpse the colorful world of minerals under the lamp at The Thomas S. Warren Museum of Fluorescence, located at http://sterlinghillminingmuseum.org . When certain minerals are placed under ultraviolet light, they fluoresce, producing tantalizingly beautiful and otherworldly results. Read all about this mysterious property in About Fluorescence. Specimen Photos display examples of fluorescence at work. Check out What’s Here if you decide to visit the real-life Museum.