The Llanos (Los Llanos) is a vast tropical grassland in Eastern Colombia, which extends to the border with Venezuela. Here you will find immense estate farms, wide rivers and green fields whose only limit is the horizon.
The primary river is the Orinoco, forming part of the border with Venezuela. Villavicencio is the economic and commercial center and gateway to the Llanos. Villavicencio is around 3-hours by car or an hour flight from Bogota.
Some hotels will let you use their facilities (gym, spa, pool, beach, etc.) for a reduced day pass. This can be great for layovers!