- Length: up to 40 min
- Wheelchair accessibility: No
A lookout tower overlooking the town of Benešov nad Ploučnicí is 750 m away from the castle complex.
The ruin of the Ostrý castle 1.5 km southeast of the city of Benešov nad Ploučnicí.
At about 1.5 km southeast of the town of Benešov nad Ploučnicí, the members of the Markvartic family were built after the Ploučnice River in the 13th century.
The ruin of the castle is accessible by a comfortable half-hour walk from Benešov Castle.