I got 5...and I'm Brazilian. I tried Madeira, the Island where Cristiano Ronaldo was born, tried Cascais, Fátima...But never heard of Vila Nova de Gaia, Barreiro(here is Brazil this is the name of a famous Cachaça, the national drink), Viseu or Almada...
Vila Nova de Gaia is a Porto's suburb and Queluz, Barreiro, Almada, Cacém and Amadora are Lisbon Suburbs. Both cities have very limited area compared with other European cities and that explains the low population. In fact, there's no division between Porto and the suburbs and the same for Lisbon.