Escorted Tours -- Because Manzanillo is so spread out, you might consider a city tour. Bahías Gemelas Travel Agency (tel. 314/333-1000) runs half-day city tours for about $25. Other tours include the daylong Colima Colonial Tour (about $70), which stops at Colima's Archaeological Museum and principal colonial buildings, and passes the active volcano.
Sunset Cruises -- The Antares (tel. 314/333-1371; www.antaresmanzanillo.com) departs from Playa Audiencia at different times depending on the season and costs around 360 pesos; buy tickets from a travel agent or your hotel tour desk. The cruise includes drinks, music, and entertainment, and lasts 1 1/2 to 2 hours.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.