The Saint John festivities in Aldealengua Activity · Aldealengua, Las Villas, Salamanca Image of Aldealengua, not of the place itself. The patron saint festivities are held on 23 and 24 June, around the summer solstice and the feast of San Juan Bautista. With some 730 inhabitants in the 2025 register, Aldealengua is one of the most populated municipalities of Las Villas. Photo: r2hox from Madrid, Spain (CC BY-SA 2.0) What to see and do in Aldealengua