From the highest Peak of Costa Rica you can see multiple lakes. You have to walk 20 Km. to reach this point. There is a place to stay the night for the first part of the trip (15km.) that usually takes from 6 to 8 hours walking. Then you can reach the Chirripo Peak the second day 5km. more.
Recently Central America covers 7 countries between North and South America. Guatemala,Belize, Honduras, El Salvador, Nicaragua, Costa Rica and Panamá.