Plakánek is the name of the picturesque valley of the brook Klenice below the castle Kost, in the direction around the pond Obora to the village Střehom. The valley is lined by sandstone rocks, there is also a small well, Roubenka there, a popular place of the writer Fráňa Šrámek (1877-1952). Leading through Plakánek is an educational path.