Hollow Grove is a town in Rothurland within the jarldom of the frost giant Hrimnir. The inhabitants of this unique settlement in Rothurland's redwood forests once lived in the still-living hollowed-out trunks of the massive trees. Spiral staircases carved out of the wood separated floors within the towering trees, some of which had up to eight levels of living areas. During Hrimnir's conquest of the town in Y9962*, the giants within his armies burned out the interiors of the trunks to drive out the defenders. Today the smaller folk that once lived in Hollow Grove are gone - giants now account for nearly the entire population of the town, residing in tents around the old redwood homes.
The giants have carved some of the redwoods around the town into massive totem poles depicting their revered ancestors.