1. City of Greyhawk Boxed Set: This formed the basis of almost every 1e campaign I ran in high school. What made it great for me was that it gave enough detail on the city for interesting adventures, but it also looked at the areas around the city. There was enough of a mix of dungeon, urban, and wilderness adventure that the city served as the centerpiece of entire campaigns that featured a broad array of adventures. I also loved the 12 (or more) adventure cards that it came with. Each card had a complete, one evening adventure set in or near the city, great stuff for starting up a campaign or filling in gaps. Minding the Store served to kick off at least three campaigns that featured the PCs going up against the Greyhawk thieves' guild.
2. Flying Buffalo's City Books: I really love the plug and play nature of these, plus each location has at least one cool, memorable hook. I'm blanking on the details at the moment, but I've gotten a lot of mileage out of the series.
3. Waterdeep: I never ran a game in Waterdeep, but I've played in several Realms campaigns and this was always a fun place for adventure. The City of Splendors boxed set was great. It was really cool for the DM to unfold an entire map of the city, and then let us run wild as we chased down various villains, cultists, and other threats. Undermountain is always a good venue for a quick dungeon bash.
4. Lankhmar: I've always had a soft spot for this city. It's a pity that it always had to be shoehorned into 1e/2e.
5. Thieves' World: I haven't seen it yet, but it's shaping up to be quite interesting. I'm looking forward to its release at GenCon.
2. Flying Buffalo's City Books: I really love the plug and play nature of these, plus each location has at least one cool, memorable hook. I'm blanking on the details at the moment, but I've gotten a lot of mileage out of the series.
3. Waterdeep: I never ran a game in Waterdeep, but I've played in several Realms campaigns and this was always a fun place for adventure. The City of Splendors boxed set was great. It was really cool for the DM to unfold an entire map of the city, and then let us run wild as we chased down various villains, cultists, and other threats. Undermountain is always a good venue for a quick dungeon bash.
4. Lankhmar: I've always had a soft spot for this city. It's a pity that it always had to be shoehorned into 1e/2e.
5. Thieves' World: I haven't seen it yet, but it's shaping up to be quite interesting. I'm looking forward to its release at GenCon.