Dare to drive your personal mini-submarine in the Nizúc Reef. BOB is a new concept in Cancun that allows you to see the vast marine life a little bit closer. This activity is available Monday to Saturday. Times: 10:30 am, 12:00pm, and 1:30 pm Check-in is at Marina AquaworldBlvd. Kukulcan, Zona Hotelera, Cancún. If you have questions, text us on the live chat button.