Parque de las Presillas, Urban park in Alcorcón, Spain.

Parque de las Presillas is a 57.5-hectare peri-urban park in northeastern Alcorcón, bordered by the M-40 and M-406 and adjoining Leganés's Arroyo Butarque linear park. It occupies the valley of the Butarque stream, dropping about 40 metres from 700 m by the M-40 to 660 m at the park's dam. Its 40 hectares of woodland are mainly stone pine, with a relict grove of 32 century-old cork oaks.

The land functioned as a military farm until the early 1990s, when Alcorcón's city council took it over during the construction of the nearby M-40 highway. That change ended its agricultural use and opened the area to the public for the first time.

The cork oak grove is one of the last remnants of the native vegetation that once covered the land around Madrid. Walking through this part of the park, visitors can see the thick, gnarled trunks up close and understand why local residents treat this area with particular care.

The park sits between several neighborhoods and can be reached on foot from different sides of the city. Going in the morning or late afternoon tends to be more comfortable, as traffic noise from the surrounding roads is less noticeable at those times.

The park's 32 centenarian cork oaks, covering 1.8 hectares, are listed as a native seed source (FS-46/F/28/005) under Spain's Ministry of Agriculture, and Madrid's regional catalogue protects them as trees of special interest. Their acorns and seedlings are meant to supply cork oak restoration projects, so new groves elsewhere in the region can trace their stock to this stand.