Tobia is a tiny town about 75 kilometres northwest of Bogotá, built around what was once a steam-train refuelling stop. The trains are long gone, but Tobia has found a new purpose as Colombia's most popular weekend rafting destination. The Río Negro runs through rapids within walking distance of the village, and several operators run group trips on inflatable rafts — typically six to twelve people per boat, with helmets, life jackets and a safety briefing before you hit the water.
The town itself is just a plaza with a church, a shop and a police station, but the surrounding mountains offer trekking, climbing and swimming alongside the rafting. Most visitors come on an organised day trip from Bogotá, though it is possible to stay overnight. The annual fiesta at the end of June features improvised bullfights in the street.