This program explores the geography, history, and some important cultural features of the Mountain Region of the United States. The individual states of Colorado, Utah, Wyoming, Idaho and Montana are presented in detail.

Saturday’s massive eruption in Tonga came from a giant underwater caldera.

This clip looks at the physical features, climate, history and culture of Greece.

The video discusses different types of volcanoes and how they are formed based on different types of volcanic eruptions. It covers four main types of volcanoes: cinder cone, shield, dome, and composite (or stratovolcano). The video also...

This live-action video program is about the term Ngorongoro Crater. The program is designed to reinforce and support a student's comprehension and retention of the term Ngorongoro Crater through use of video footage, photographs,...

Upon viewing the Exploring Freshwater Biomes video series, students will be able to do the following: List some of the ways fresh water is used in daily life. Understand how and why fresh water is so important to the lives of humans and...

Kilauea ramped up its surface activity on Tuesday when lava began pouring out of a vent in its caldera.

Halema`uma`u crater of Kilauea Volcano as seen from the Jaggar Museum in Volcanoes National Park, Hawaii.

Chunks of rock fall off cliff into boiling lava lake, Marum Volcano, Ambrym Island, Vanuatu

Bears in Yellowstone / Norris Geysers Signage / Moose in Trees / Father and Son Walking / Panorama of Geysers / Up Close to Geothermal Activity / Norris Geysers on June 16, 1972 in Yellowstone National Park, Wyoming (Footage by Getty...

Crater Lake

Toxic volcanic gases stream from the edge of giant crater, Marum Volcano, Ambrym Island, Vanuatu

Toxic gases swirl over volcanic landscape, Marum Volcano, Ambrym Island, Vanuatu

Toxic volcanic gases blow off the edge of crater, Marum Volcano, Ambrym Island, Vanuatu

T/L, WS, sunrise reveal of Lake Mashu in winter / Akan National Park, Hokkaido, Japan

Mount Fuji and Lake Ashi, Hakone National Park, Japan.

MS Mud volcano beside Lake Akan in Akan National Park / Teshikaga, Japan

MS PAN Mud volcano beside Lake Akan in Akan National Park / Teshikaga, Japan

CU Mud volcano beside Lake Akan in Akan National Park / Teshikaga, Japan

Famous Orthodox church with blue domes in village Oia (Ia) on Santorini island. Canon 5DMkIII.

Famous Orthodox church with blue domes in village Oia (Ia) on Santorini island. Canon 5DMkIII.

Famous Orthodox church with blue domes in village Oia (Ia) on Santorini island. Canon 5DMkIII.

Famous Orthodox church with blue domes in village Oia (Ia) on Santorini island. Canon 5DMkIII.

Famous Orthodox church with blue domes in village Oia (Ia) on Santorini island. Canon 5DMkIII.