"Castelo dos Mouros on a hill, outside" Castelo dos Mouros - Moorish Castle Tip by Martin_S.

Castelo dos Mouros (the Moorish Castle), perches on its hilltop, a silent sentinal above the town of Sintra.
The Portugese of today waves from several of its crenelated towers along the walls.
But these photos here show the approach walk which leads you through a moss draped forest with enormous boulders overpowering you at every step. There is a trail that it is possible to take down to the city of Sintra.

Directions: Found in the same park as the Pena Palace, on the hill above Sintra, just look UP.
http://www.portugalvirtual.pt/_tourism/costadelisboa/sintra/mouros.html
othercontact: info@parquesdesintra.pt
Phone: +351 21 923 73 00
Website: http://www.parquesdesintra.pt