The Lago de Tota is the biggest lake in Colombia. There are several small islands, a perfect setting for a canoe or kayak ride across the lake. Also, you can try more adventurous watersports like water ski or diving.
Desierto de la Tatacoa, Huila, Colombia, which is the second largest arid zone in Colombia and occupies 330 square kilometers of the land. Perfect place to just catch your breath and enjoy the silence in the sun.