Monasterio de El Paular. The 1390 charterhouse at the valley's head — monks still in residence, Vicente Carducho's restored painting cycle in the cloister, visits daily.
Cascadas del Purgatorio. The valley's signature walk — riverside forest to a double waterfall in the Reserva de la Biosfera; 12 km round, gentle gradients.
Purgatorio waterfalls & the Paular meadows — 12 km · 4 h. El Paular bridge → Las Presillas river pools → the forest path to the Cascadas del Purgatorio → return by the same bank with the monastery framed against Peñalara. The valley's greatest hits in one out-and-back.
El Bosque Finlandés. A Finnish-style birch and lake landscape planted in the 1990s — the sierra's most photographed picnic spot, five minutes from town.
Peñalara from Cotos. The Guadarrama's 2,428 m roof — from the Puerto de Cotos (up the valley road or by C-9 rail) a signed national-park path climbs past glacial lagoons.
Sleeping here? Beside El Paular for the monastery-and-mountains setting; in the village core for bars and bakeries within slippers' reach; casas rurales toward Oteruelo and Alameda for families wanting gardens. Everywhere here, book weekends well ahead — supply is genuinely tiny.
Curated picks are coming — meanwhile, the live search covers every bookable property at the same price or better.