ÃÂhoà ¡à ¥ () is a hill and a national nature reserve in the ÃÂstànad Labem Region of the Czech Republic. It lies in the Doupov Mountains. The hill reaches the elevation of . It is also a place where might have occurred the Battle of Wogastisburg in 631 AD.
ÃÂhoà ¡à ¥ is located in the Doupov Mountains in the municipal territory of Kadaà Â, between the villages Brodce and Pokutice (parts of Kadaà Â). The hill is a mesa with an area of ; the plateau at the top has an area of . It has been protected as a national nature reserve since 1974. The national nature reserve has an area of and a negligible area of the reserve lies also in the territory of KlÃ¡à ¡terec nad Ohà ÂÃÂ.
The hill arose in connection with the volcanic activity thad created all the Doupov Mountains. It is thus mainly formed by basalt.
In terms of plants, the area is very diverse. There are 1,000 plant species out of 3,000 recorded in the Czech Republic in the nature reserve. The slopes are covered with natural forest and steppe phytocoenose with such plants as hepaticas, orchis, pasqueflowers and others.
There is also a rich bird colony (owls, bee-eaters etc.).
There used to be a village ÃÂhoà ¡à ¥ on the top of the hill. It probably existed in Prehistory and some cultures from the Bronze Age (KnovÃÂz culture) have been approved by excavations. The first written record of the village comes from 1401 when it was sold to a Kadaà  townsman. It changed the holders coming usually from the nearby noble families. It remained in the property of the Thun family since the confiscations after the Battle of White Mountain till 1850 when it became an independent municipality and had a steady population of about 50 people. The population started to decline after World War II, and the village was officially dissolved in 1963. Nowadays there are just scrubby ruins of several houses.
There is an educational trail leading through the nature reserve.