Sherpe Rotsen
These pillars in the Gedder Zee are considered Frisia's south border. They sit in the water off the coast of the Shaddensumpf. Between these two features, traveling by boat or ship along the coast here is treacherous. However, sailing through the Roversdoorgang waterway that is rife with pirates from Roverseilan is likely not a better option.
Geography
Numerous tall clifflike rocks stand like pillars rising out of the Shaddensumpf and the Gedder Zee. Small waterways connect them, but traversing these waterways is hazardous.