Renewal; Celebrating the Practice. A retreat in Costa Rica. The Peace Retreat center is located in the town of Los Pargos, Guanacaste Province, Costa Rica. Situated on an old farm, the property is surrounded by beautiful trees and flowers, and has both an open and an intimate feeling. You’ll hear songbirds and howler monkeys early in the morning, and you’ll enjoy warm breezes and the sound of silence in the evening.