Cancun is a popular tourist destination located on Mexico's Yucatan Peninsula known for its year-round sunshine and tropical weather. The document provides tips for planning a trip to Cancun including what to pack and highlights several outdoor and cultural activities to enjoy like scuba diving, visiting Mayan ruins, and exploring ecological parks featuring the local flora and fauna. Popular day trips from Cancun include Isla Mujeres, Puerto Morelos, and Xcaret Park.