The Museu Nacional DOS Coches near the monastery is one of the best four-wheeled carriage collections in the world and a very popular Museum in Lisbon. Looking up information on the internet, I think I must go to see it, but it is very low-key, small facade, it is really difficult to find. Ask people all the way, until finally the police uncle led the way. Tickets are 6 Euros per person. Although the venue is small, it is rare to see it anywhere else. It is still worth it.