A BBC reporter with close ties to the Church of Scientology, which claims members like Tom Cruise, John Travolta and Kirstie Alley, alleges that the church has constructed an “alien space cathedral” in the desert of New Mexico.

• Its vault houses the lectures of church founder L. Ron Hubbard on gold discs locked in titanium caskets sealed with argon. The cathedral is H-bomb proof, protected by three 5,000lb stainless steel airlocks,” writes Sweeney. “Experts say the weird signs on top of the mountain will guide Clears, (high-ranking Scientologists) returning from space to find Mr. Hubbard’s works after a nuclear Armageddon wipes out humanity.”