The Thomas van der Hammen Natural Reserve or Thomas van der Hammen Forest Reserve is an area of the Bogotá savanna that is under environmental protection. The natural reserve was declared as such in year 2000 by the Ministry of Environment and Sustainable development. It takes its name from the Dutch-Colombian geologist Thomas van der Hammen who devoted his life to the research of the region. The surface area of the protected reserve is approximately 1,395 hectares and it is located in the north of Bogotá.