If you like diving, go for a guided scuba tour and explore Elephant Rock, San Luciano Shipwreck or the famous coral reef named the Aquarium.
Official website http://www.divemanzanillo.com/divecenter.htm
Email scuba@gomanzanillo.com
Address 5 Boulevard Costero Miguel de la Madrid Hurtado, Las Brisas 28218, Mexico
Coordinates 19°6'8.518" N -104°19'41.336" E