Reminiscent of a Game of Thrones set, the Torre de Belém is a charismatic fortress standing in the Tagus Estuary, near the point where it flows into the Atlantic. Built in 1515, the nautical tower is adorned with quirky carvings of ropes, a rhino and shields. To get inside, which can take some time, tourists queue on a wooden jetty. Unfortunately, from some angles, the view of the tower is marred by an industrial plant on the other side of the river.
