the sewers

the sewers are... sewers... it's pretty straightforward. the relevant parts are where the tunnels still lead out toward the swamp, since this provides hopeful explorers with a secure and relatively quick route out without having to pass through the barrier forests, which carry a little danger. the only real danger in the sewers is the lack of sanitation, and the sewer rats, but they're not so bad if you know how to deal with them.