Parc de Pedra Tosca, Nature reserve in Les Preses, Spain.

Parc de Pedra Tosca is a park in the Bosc de Tosca neighbourhood of Les Preses, within the Garrotxa Volcanic Zone Natural Park. It covers 2,500,000 m² and was recovered between 2003 and 2004 through a LIFE Environment project planned by RCR architects Carmen Pigem, Ramon Vilalta and Rafael Aranda. The park is a maze of paths, dry stone walls, cleared plots (artigues) and small stone huts, with clean geometric lines added by the architects.

During the 19th century, local farmers stacked volcanic stones systematically to create small plots for farming and make the hostile landscape usable. This work led to the network of paths that is still visible today.

The name Pedra Tosca refers to the rough volcanic stone of the terrain. The dry-stone walls, huts and plots were built by local farmers after the 19th-century desamortización, when common oak woods were cleared and stones removed from fields. Today the park keeps traditional crops and ecological farming techniques, and the Ruta del Carrilet II crosses the old railway route.

The site is open daily from June through October except Mondays, while winter hours are limited to weekends and holidays. Wear proper footwear since the paths cross uneven volcanic ground and the surface is irregular.

Small stone huts tucked along the pathways once stored farming tools and now stand visible among the oak trees. These humble structures show how farmers created practical solutions even in difficult terrain.