A large part of land under Colmenar Viejo's jurisdiction is inside of the Parque regional de la Cuenca Alta del Manzanares (Manzanares Upper Basin Regional Park), causing that land to be under a high protection environmental level.

The Navalvillar Grassland is protected by the municipality and, albeit it does not belong to the Park, it is quite rich in flora and fauna.

Colmenar Viejo has a train station in the outskirts of the town, which is the terminal of line C-4 of Cercanías Madrid.

The Colmenar Viejo bullring was inaugurated in 1891, and has since come to be one of Spain's foremost, second only to Las Ventas in downtown Madrid.

[9] It gained notoriety in 1985 when a bull named Burlero gored the popular bullfighter José Cubero Sánchez ("el Yiyo") to death.