The Tajo Nature Trail shares signage with the long-distance GR-113 trail, and is over a thousand kilometres long and offers landscapes as it runs through the centre of the peninsula following the course of the longest river in Spain. The diversity of environments and natural spaces is immense from its source in the Montes Universales until it enters the lands of Portugal. In Las Vegas madrileñas it runs through a fertile rural plain that has been a vegetable garden and agricultural resource for the capital for centuries.