Over several decades, surrounding lands were purchased and nearby national parks connected to the growing protected area, so that the Guanacaste Conservation Area came to encompass a high diversity of tropical dry forest, rainforest, cloud forest, and marine habitats.
The Guanacaste Conservation Area expanded through the acquisition of land and the integration of neighboring national parks, leading to its current status as a diverse ecosystem encompassing tropical dry forests, rainforests, cloud forests, and marine habitats.