Heading to Sintra in about a week. Question: I will be visiting Pena palace, Castelo de Mouros, and Quinta da Regaleira. So I will need to use bus 434 and 435. In this case, is the 1 day pass worth it or should I just pay the driver the 4 euro one way trip every time I enter the bus? Just from doing the math I'd probably have to pay more than 15 euros for all the times I will be stepping on and off the bus. Is this correct? want to confirm.