Castellnou de Bassella Monument · Bassella, Alt Urgell, Lleida Image of Bassella, not of the place itself. Castellnou de Bassella was a village in the municipal district of Bassella (Alt Urgell), located next to the old road from Ponts to Oliana, on the left bank of the River Segre. It formed a joint municipality with Aguilar de Bassella and la Clua d'Aguilar in the 19th century; the churches of Bassella, Guardiola and Mirambell were dependent on its parish church, dedicated to Sant Simeó. The village, whose population was 44 people in 1996, was gradually evacuated and its houses demolished: today it lies submerged beneath the waters of the Rialb reservoir, which began flooding the area when the gates were closed in 1999. That same year the remains of the medieval necropolis were exhumed and moved along with a dolmen known locally as the Dolmen del Perotillo. Photo: Msabartres (CC BY-SA 3.0) What to see and do in Bassella