Aerial of a Volcanic crater outside, Goma, Democratic Republic of Congo, Africa

Fonualei South Volcano, Sonar Image

West Mata Volcano, Bathymetric Map

Volcano O, Lau Basin, Sonar Image

Gravity Map of the Moon, GRAIL

Patrick Harper uses a compass and a topographic map to navigate through the mountains above Ouray, Colorado. Harper, a member of Team Montrail, was practicing his navigation skills for the Primal Quest adventure race. Harper trained in the mountains above Ouray, Colorado for a month before the event to get better acclimatized to the high elevation.

Patrick Harper uses a compass and a topographic map to navigate through the mountains above Ouray, Colorado. Harper, a member of Team Montrail, was practicing his navigation skills for The Primal Quest Adventure Race. Harper trained in the mountains above Ouray, Colorado for a month before the event to get better acclimatized to the high elevation.

Patrick Harper uses a compass and a topographic map to navigate through the mountains above Ouray, Colorado. Harper, a member of Team Montrail, was practicing his navigation skills for the Primal Quest adventure race. Harper trained in the mountains above Ouray, Colorado for a month before the event to get better acclimatized to the high elevation.

A male hiker checks his location with a compass and topographic map.