The archaeological site of Colaride, is a Roman necropolis in a natural cave, located in the Portuguese civil parish of Agualva e Mira-Sintra, municipality of Sintra.
Wikipedia https://en.wikipedia.org/wiki/Archaeological_Site_of_Colaride
Address Massamá 2735, Portugal
Coordinates 38°45'43.153" N -9°17'28.798" E