Olesa de Bonesvalls (Catalan pronunciation: [uˈlɛzə ðə ˌβɔnəzˈβaʎs]) is a village and municipality in the Alt Penedès comarca in Catalonia, Spain.

[4] The land is stony karst with many caves, notably "Avenc de l'Esquerrà" at 348 m,[4] the deepest in Spain.

[citation needed] Its most notable building is Hospital de Cervelló, a fortified hostel complex for travellers dating from 1262, which has remained in good condition.

[4] Its economy is based mainly around agriculture, predominantly vineyards and orchards, and small local industry.

In 1262 Olesa de Bonesvalls hosted a two-floor hospital whose architecture reproduced the Italian infirmaries of Fossanova, Viterbo and Casamari.