Härmälän rotko is a geographical sightseeing spot on the border of Masku and Naantali. It is popular among hikers and geocaching people.
Most of the cliff is quite sunny. The routes inside the gorge are in the shade all day long. The cliff faces are at best ~20 m tall. Parts of the terrain in front of the cliff is rocky and hard to travel through, but is still mostly safe.
In addition to the gorge, the rock formation includes crevice- and lipcaves, found all around the gorge.
Härmälän rotko is the largest gorge in Southwest Finland. The top of the cliff is a great vista.