Giant Rock

It is located on land which was at that time leased by George Van Tassel, a friend of Critzer's, a purported flying-saucer contactee and organizer of UFO conventions.

[4] In 1947, Van Tassel, a former aircraft inspector, leased the property from the Bureau of Land Management and left Los Angeles and moved to Giant Rock with his wife and three children.

[2] During the early 1950s, Van Tassel began hosting Friday night “meditation” sessions in Critzer’s former underground home, where he claimed to receive telepath communications from "compassionate Venusian extraterrestrials.

Between November 1961 and October 1962, it served as the launch site for helium-filled balloons used by R. F. Miles, Jr. to measure the density of neutrons in the Earth's atmosphere at altitudes between 8,000–115,000 feet (2,400–35,100 m).

[7] Australian artist Tina Havelock Stevens won the Blake Prize with a video work depicting her drumming at the site.