Cape Roca, the westernmost point of continental Europe. Stand before the "End of the World" monument and witness where the Atlantic Ocean meets the Bay of Biscay—waves crashing against the black cliffs.
Boca do Inferno - Devil's Mouth, witness the sea-eroded cave resembling a "devil's throat" being torn by massive waves, with white foam gushing like boiling water.
National Palace of Sintra + National Palace of Pena, stay in the magical world of Harry Potter.