Rock art work.
The Harfenice Natural Formations are large sandstone blocks made of 1841 sculptures. They consist of large human heads and the main character is a sitting girl with a harp, after which the formations are named. The sphinxes on the cave portal are also interesting. They were carved into sandstones by Václav Levý, who is also the author of the Devil's Heads in Kokořínsko and the decoration of the Klácelka Cave. The footpath begins at Želízy on the yellow tourist trail.