It should be noted that the following description was taken partially from my encounter with a huge troll Shadow Knight named Jubjub while I was travelling to this area to seek out the frogloks. I had just barely escaped with my life after finding a haunted ruin within the swamp, when I stumbled across this troll, healing quickly beneath a tree. He spared my life only because I healed him with my song and was able to entertain him with my drumming skill (and, I would later find out, because he had previously tried half-elf flesh and really didn't favor it). Some wonder why I would bother to interact with the likes of him, but I was injured and the sword he picked up when I encountered him was as long as I was tall, and covered in gore and chunks of hair and scales... Being rather intelligent, for his race, he scratched the above map in the dirt for me and gave me a description of its inhabitants, although his take on them was quite the opposite from what I express below. He warned me to never travel within, for his buddies would "smash" me. I followed his advice...
Grobb is a very small compared to some of the human towns on Antonica, and very utilitarian in its design. The entrance from the vicious Innothule Swamp is heavily guarded by trolls, and the interior of the caverns has many sights that would turn an outsiders stomach. There are prisons for their enemies, the frogloks, as well as anyone else unfortunate enough to stop by for a visit. There are multiple sites for torturing these prisoners as well. Mud flows freely through their town, and they seem not to mind. The guilds of the Shadow Knights and Shamans are hidden away in dark mines, away from the light of day. The Warrior's guild is near the entrance, which can be a problem for their neighbors, the ogres, because the Warriors have an intense rivalry with them.
The Innothule Swamp is a dark and dangerous place, even for the trolls who roam it daily. The numerous small islands can quickly confuse and lose a traveller, and roaming fungus men, kobolds, and much worse can easily run down an outsider who hasn't learned the way around, or anybody who hasn't learned how to swim. Adjacent to Innothule Swamp is the Feerott, another drier swamp area which is where the ogres have made their home. There is a great deal of travel between the two races' home towns, and something of an alliance exists between the two, opposed as they are against most of the rest of Norrath.
From the Innothule Swamp it is possible to travel directly to the Desert of Ro, although the path is very dangerous and the Desert of Ro even more so. This is the way to travel overland to the human city of Freeport, however, and through there to Faydwer (assuming you can get on the boat). By passing through the Feerott, it is possible to reach the Rathe Mountains and, past them, the Plains of Karana east of Qeynos. This path is frightening and desolate, and there were many times I was glad for my drumming ability.
Travelling To and From Grobb
The access to Grobb is through the Innothule Swamp, which can easily be reached from the ogre home of Oggok by travelling a short distance through the Feerott. It is possible, although arduous, to reach both of the human cities of Qeynos and Freeport. The former is reached through the Rathe Mountains north of the Feerott, and then the vast Plains of Karana north of that. The latter can be found adjacent to the Desert of Ro, which stretches north of Innothule Swamp for many miles.
The town is a horribly primitive place. There is one bar and two places of torture, one out in the open and the other hidden in a cave. There are also several prisons, one main one and several private ones, usually owned by the guilds. The only other places of interest are the single, well-stocked weapons and armor shop, the bank, and the guild halls buried away in old mines ringing the troll glade.
There aren't many nice things to say about the people of Grobb, if you can even refer to them that way. They have no crafts other than weaponmaking available to them, and no activities other than watching torture, fighting, and drinking. Be wary of them in their good moods.