Porto (see map) is one of the main cities in Portugal. The agglomeration is located around banks of the Rio Douro. The banks are rocky and high. Five high bridges are crossing the river. Two of them were designed the same style as the Eiffel tour in Paris – one by the Gustave Eiffel himself together with Théophile Seyrig (Maria Pia Bridge, 1877), the other one by his colleague Théophile Seyrig (Luís I Bridge, 1886). To see all the bridges as well as colorful banks of the Douro river, we took a ride on a tourist boat – a service that is regularly offered there.