Ursa Minor (cave)

Ursa Minor Cave is part of Sequoia National Park, a naturally formed system of caves in California's Sierra Nevada.

After widening the hole to allow for human entry, the explorers discovered one of the most spectacular caves in the western United States.

The cave was featured in the September 2007 issue of National Geographic magazine and has attracted many scientists and researchers interested in finding new species of troglobites, organisms that live in the complete darkness afforded by caves.

Access to this sensitive cave is currently limited to scientific and survey trips.

This article about a cave in the United States is a stub.