At present most excursions into the Selva or Llanos are arranged through companies based in Bogotá, mostly for the convenience. But these trips are often much more expensive than arranging them with locally based companies. In Leticia are many tour agencies offering trips into the jungle and to lodges. Slowly, as the Llanos become more secure, tour operators are opening shop in Villavicencio. These are providing whitewater rafting and rock climbing, as well as expeditions to Parque Nacional Natural Sierra de la Macarena. Some activities can be done on your own. Nonetheless, because of environmental and security (re: war) considerations, it is highly advisable to go with a guide, preferably one from the area who would know the situation more in-depth.