The castle of San Esteban de Gormaz is one of the key castles that changed ruler once and again during the 10th and 11th century when it finally came under Christian domain. During the reign of King García I, king of Leon, it was reinforced giving place to a repopulation of the town. From there, soldiers would control transit through the Douro River and they would guard the bridge that passed over this river. Nowadays, what is left of the castle is a large wall that is about two metres thick. The castle was built with ashlar stonework, possibly of Roman origin.
Near the access gate, there is a great opening in the ground known as Pozo Lairón, although is not certain what it was used for. The castle is narrow and elongated, and inside there are remains of water pools and underground constructions. Although it is quite deteriorated, it is of great importance due to its strategical location from which you can see the castle of Gormaz.References:
The Naveta d"Es Tudons is the most remarkable megalithic chamber tomb in the Balearic island of Menorca.
In Menorca and Majorca there are several dozen habitational and funerary naveta complexes, some of which similarly comprise two storeys. Navetas are chronologically pre-Talaiotic constructions.
The Naveta d"Es Tudons served as collective ossuary between 1200 and 750 BC. The lower chamber was for stashing the disarticulated bones of the dead after the flesh had been removed while the upper chamber was probably used for the drying of recently placed corpses. Radiocarbon dating of the bones found in the different funerary navetas in Menorca indicate a usage period between about 1130-820 BC, but the navetas like the Naveta d"Es Tudons are probably older.
The shape of the Naveta d"Es Tudons is that of a boat upside down, with the stern as its trapezoidal façade and the bow as its rounded apse. Its groundplan is an elongated semicircle. Externally, the edifice is 14.5 m long by 6.5 m wide and 4.55 m high but it would originally have been 6 m high.
The front, side walls and apse of the edifice consist of successive horizontal corbelled courses of huge rectangular or square limestone blocks dressed with a hammer and fitted together without mortar, with an all-round foundation course of blocks of even greater size laid on edge.