rothko having 34 streets visited and my having 33 had me check this.
- groddle forest (18 streets plus properties)
Upper Valley Heights
Middle Valley Meadow
Adanac
Groddle Forest Junction
Thicket
Burnabee
Northwest Passage
A Wintry Place
Switchback
Doon Way
Lem Hill
Ti Street
Lower Valley Hollow
The Short Track
Hechey Track
East Valley Clearing
West Hechey Clearing
The Great Hole to Ix
a zillion properties
- ix (4 plus uncle's)
Groddle Ladder
Ruta Ascension
Guillermo Gamera Way
Uncle Friendly’s Emporium
Flipside
- uralia (3)
Cebarkul
Oktyabrya
Ilmenskie
- ilmenskie caverns (7)
The Entrance
Level 1 East
Level 2 East
Level 1 West
Level 2 West
Karpal Tunnel
The Drop
- quest areas (2)
Rainbow Run
Hairball area
- death (1)
Hell One
So, that's 33 plus 2 quest areas (which I assume don't count), Uncle F's (which I assume is part of GG Way) and properties (which I assume are part of the street they're on). I have credit for 33 visited and there's rothko's 34. Just confirmed that other people's properties don't count.