Inside there's one of the best things you'll ever taste in your life: called "travesseiro". As we say in Portugal, "é a prata da casa" - something like "it's the house's silver", wich means the best there is about that place.
Situated on the old side of Sintra, the historic centre where the palaces and castles are at your doorstep. A must if you're visiting Sintra, or the surroundings :)