The bridge has the name "Roman" in some texts but it is actually a work from the 18th century, built by order of Felipe V to facilitate the passage of carriages on their journeys between the Royal Site of La Granja and El Paular. The bridge has a large arch of rough, rough masonry, wedged between two granite ledges in a narrowing of the valley.
The environmental conditions of the high mountains condition the diversity of plants and animals that inhabit the natural environment of the Angostura Valley. The confluence of the streams and the banks of the water currents are interesting places to observe the environment with curiosity and discover the details that give value and quality to the natural kingdom of the Sierra de Guadarrama. The murmur of fresh and crystalline water running through the torrent, skipping rocks and pine roots, is an invitation from the river ecosystem to get closer to the botanical nature of the pine forests of the Angostura Valley. The Scots pine dominates the forest landscape but on the banks of the streams, changing color with each season, filling the pools of water with leaves, willows, hawthorns, rowans, ivy, mosses, ferns, vines, wild roses and various species appear. of aquatic plants. The birds of the forest also tend to frequent the course of the rivers and ravines looking for water and food.