Scorpio reef is the second largest barrier reef in the world, located near Punta Nizuc, Mexico. The Sub See Explorer offers tours through the Nichupte lagoon and mangrove channels, allowing guests to experience the natural beauty of the Mexican Caribbean. Tours are 2 hours long and include a 30-minute guided tour on the air-conditioned Sub See Explorer, with an open bar serving beer, soda, and water. Tours run daily from 9am to 3pm, and tickets cost $44.40 including tax.