It took George Van Tassel — a former aeronautical engineer and test pilot who worked with people like Howard Hughes, and a leader in the UFO movement — 18 years to build the Integratron. Later, Tassel would claim he made actual contact with extra-terrestrials at the site and considered it a kind of time machine, even. Today, the massive dome building offers sonic healing sessions to vacationers who believe the structure is a mecca for physical and spiritual healing.