The Black Rock (portuguese name Rocha Negra) of Praia da Luz it is a rock formation of volcanic origin in the middle of others of limestone composition.
And proof of volcanic activity in Portugal for over 70 million years.
The Bridge Luis I is a metal structure with two boards, built between 1881 and 1888 by the belgian engineer Théophile Seyrig, connecting the cities of Porto and Vila Nova de Gaia separated by the river Douro.