The archaeological area of Bahni was discovered in the city of Hidalgo in 1988 AD. It is located in the northwestern part of the city, in the highest part of the plateau where the semi-desert landscape dominates the Mezquital Valley, and to reach this place you have to pass through semi-desert lands, under the sweltering sun. The area of this area is about three hectares, where the rich and high-class residents of the region lived in the tops of the hills, and the ordinary city dwellers lived under the hills they cultivated. The construction in the Bahni area dates back to the mythical era, and the discovered area is the Great Square or the Acropolis where the Pyramid of the Sun is located. Upon entering the site, the main structure dating back to 650 AD, with dimensions of 17 meters on each side and a calculated height of 10 metres, stands out. There is also another pyramid that was built two centuries ago. The originality of its architecture, which differs from the style of that era, made it an interesting place.