Manatee and Eco River Tours is off I-75 exit 141, 2.7 mi. n.e. on Palm Beach Blvd. (SR 80), then .9 mi. n. on SR 31 to Sweetwater Landing. Passengers aboard the 42-passenger River Queen may see manatees, alligators and a variety of native birds on guided 2-hour ecotours of the Caloosahatchee and Orange rivers, where hundreds of manatees congregate during winter months. Sunset and specialty cruises also are offered.