Pena Palace (Grounds Only)
Take the 434 bus from Sintra station to the top. Buy a grounds-only ticket — you'll access 80% of the terraces and all the exterior photo spots without queuing for the cramped interior rooms. The palace exterior is the spectacle. Walk the full loop of the ramparts for views down to the Atlantic.
Arrive before 09:30. We learned this the hard way — arriving at 10:45 on a Saturday meant a 40-minute wait just for bus 434. If you miss the early window, consider Route B instead.