Lisbon is the correct answer, since Cabo da Roca sits on the Atlantic coastline within Greater Lisbon, roughly forty kilometres west of the city centre in the Sintra municipality, and is officially recognised, including by Portuguese national tourism authorities and geographic references drawing on the CIA World Factbook's country description, as the westernmost point of continental Europe. The headland features a lighthouse and a stone monument bearing a famous line from the Portuguese poet Luis de Camoes, and its proximity to the capital makes it a popular day trip destination for visitors based in Lisbon, reinforcing the geographic link between the two. Porto, option A, is incorrect because it lies far to the north on the Douro River estuary, several hundred kilometres from Cabo da Roca, and while it is Portugal's second city, it has no direct geographic connection to this particular headland. Coimbra, option B, is an inland university city situated between Lisbon and Porto, historically important as Portugal's former capital and centre of learning, but it does not sit on the Atlantic coast at all, ruling it out immediately for a coastal landmark question. Faro, option C, lies far to the south in the Algarve region, a considerable distance from Cabo da Roca, and is associated with different coastal landmarks entirely. A common exam confusion is assuming that any prominent Portuguese coastal city could be the reference point for a famous headland, when in fact only Lisbon's immediate metropolitan area is geographically correct. Revision takeaway: Cabo da Roca, Europe's westernmost mainland point, is anchored specifically to Lisbon and its Sintra-area coastline, not to Porto, Coimbra, or Faro.