Rainbow Divers. Vietnam's only PADI dive centers are operated by Rainbow Divers, whose Ho Chi Minh City HQ is considered the gateway to dive travel throughout Vietnam. You can start your PADI training here in the city (in the Thao Dien, An Phu area) and combine it with trips to regional areas. Other outlets are in Nha Trang, Hoi An, Phu Quoc, Con Dao, and Whale Island. Buddha Bar, 7 Thao Dien St., District 2, Ho Chi Minh City, Ho Chi Minh City. 0913/408–146; www.divevietnam.com.