Holý vrch – “Bare hill”
This nature reservation occupies part of the eroded remnant of the mantle of olivine nephelinite (alkaline rock similar to basalt). It is a relatively flat hill in the České středohoří Protected Landscape Area near the village of Hlinná.
Radobýl hill (399 m a. s. l.) is a natural monument with an exposed north-south side, due to mining. It has well-developed columnar jointing of basalt rock and an arrangement of columns in various directions.
A mountain rising from afar to a height of 456 m above sea level with a Romanesque rotunda at the top. The legend of the arrival of the Czech ancestor is related to Mount Říp. This has been one of the basic symbols of the Czech nation. From the top there are beautiful views of the Central Bohemian Uplands or the deep woods of the Kokořín region.