I visited Alcobaca as part of an organized daytrip from Lisbon (together with Batalha, Óbidos, Nazaré and Fatima), so we only had a limited amount of time available there. Basically, we just got a look around the huge main church, but not at the rest of the monastery complex. The church is the largest in Portugal and features the Royal Pantheon where 3 kings of Portugal are buried. The most famous sarcopahagi, and the main reason so many tourists visit the church, are those of King Pedro I. and his mistress Ines who had an ill-fated love story in the 14th century.