Harmantepe Castle - Sakarya
Harmantepe Castle, located in the north of Harmantepe Village of Adapazarı, was built on a small natural hill. While it was surrounded by wetlands and swamps, it was transformed into fertile agricultural areas thanks to the channels passed on both sides. To reach the castle from the small Söğütlü to Akçakamish village on the left side of the road to the road should be deviated to the road. Transportation in rainy weather is a bit difficult. Harmantepe Castle, XII. or XIII. It is one of the defensive structures which has been constructed in the 19th century and has the characteristics of the outposts and observation towers that see each other along the west side of the Sakarya River. Adapazarı, Harmantepe Village 2 plot, 564 parcel on the castle, Bursa Cultural and Natural Heritage Preservation Board 18.04.1992 / 2404 with the decision has been registered as cultural assets to be protected. It is one of the strongest fortresses in the lower Sakarya basin. The castle, which is planned as elliptical, is made with local stones. The thickness of the walls of the walls vary between 2 and 10 meters. There are 6 signs of 5 x 5 meters in size. It was determined that wooden planks were placed in the form of grids in order to provide connection to the filling material made of rubble and lime mortar on the inner side of the bushes. In the course of time, the timber is seen as round holes as a result of the decay of these planks. In the upper part of the bushes there are loophole holes facing in different directions. There are 5 round arched entrances in different directions and different sizes, including the main entrance door to the south. There are holes in which the wooden latches are used to close the doors from inside to the wall. The arches of the doors, the walls and some parts of the fortification walls were destroyed as a result of natural destruction, but a significant part of the fortified castle is able to plan. The castle is covered with plants and trees. It has similar characteristics to other fortresses in our region both in terms of architecture and stone work. It is understood that there is a Byzantine period structure with these qualities.