Grutas do Rossio

The Rossio Caves were re-found between 1940 and 1950 as a result of the exploration of subterranean quarries with the system of opening tunnels and wide rooms. In the 18th century it furnished calcareous rocks used in the construction of millstones. In the summer one may visit them between 9 am and noon and from 4 pm to 8 pm and in the winter from 10 am to noon and between 2 pm and 5 pm.