Astrum Helicopters. Astrum offers customized aerial tours of the Blue Hole, Mayan sites, the Belize Barrier Reef, and others, using five-seat Bell helicopters. It also provides helicopter transfers to upscale resorts and lodges on the cayes and inland. Cisco Base, Mile 3 1/2, George Price Hwy., Formerly Western Hwy., Belize City, Belize. 222/5100 or 888/278-7864. www.astrumhelicopters.com.