Parque Acuatico Xocomil (near Retalhuleu) - The Xocomil waterpark is the perfect place to spend the day relaxing. Float on bright-colored inner tubes around the park or bob on the waves in the wave pool. Small kids will enjoy the water play area, with cool things like a volcano that bubbles up water. Another pool is just for big kids. Snack bars and restaurants in the park.
Archeological sites (Santa Lucia Cotzumalguapa and La Democracia) - One of the oldest civilizations in Central America lived in this area, more than 2000 years ago. Huge stone heads have been uncovered in the sugar cane fields. In the town of La Democracia, the stone sculptures are in the town plaza and museum. Many of the pieces are still where they were found, some half buried. To see them, take a taxi ride from Santa Lucia Cotzumalguapa to Bilbao, Finca El Baul, and Finca La Ilusiones.
Monterrico Nature Reserve and Hawaii National Park (Biotopo Monterrico-Hawaii) - Glide through mangrove swamps in a colorful boat, where you'll see green iguanas, egrets, herons and pelicans. Visit the wildlife reserve where they rescue and hatch sea turtle eggs and you can get a closer look at sea turtle hatchlings, caymans and green iguanas. On the island of Monterrico, the black sand swimming beaches are popular with local families.