The document discusses different types of empty spaces the author encountered while traveling in Northern regions. Some spaces were meant to be empty, others became empty over time as people moved on. The empty spaces carried stories that were not being told and were difficult to understand. Mapping empty spaces was challenging as impressions of emptiness are subjective. The author provides concepts for how spaces could be manipulated, such as making structures bigger or smaller or filling landscapes with noise, to better understand how much a space can accommodate.