We've looked at Taverns and Cults so far. Now it's time to step into the Ruins...
Page 19 in the d30 Sandbox Companion for those playing along at home:
Type - roll of "8" makes it a Hamlet.
Let's check out the character and degree of decay - a roll of "6" indicates it's "barely sunken"
A roll of "29" indicates it's overrun by reptiles of some sort - a roll of 10 on a d15 indicates it some sort of dragon.
Hmmm... sunken hamlet inhabited by a dragon. We'll make this encroaching swampland. Damn, which kind of dragons inhabit swampland? Probably a young adult in size. Possibly nesting with an egg or two. That would make it a high stakes encounter...
Type - roll of "16" makes it a Catacombs.
Rolling a "4" indicates it has been slightly vandalized.
A roll of "6" indicates there is a nuisance amount of magical inhabitants - a roll of "6" on a d15 looks to make that a rust monster. Shit, that might be more than a nuisance ;)
Catacombs speak for themselves. Grab a +Dyson Logos or +matt jackson map, throw in some mindless undead along with the rust monster and you have a prefect recipe for a low level dungeon.
Overall, quick and dirty and fine for a quick encounter. If I was looking for more in depth (and done in advance) I'd probably opt for Tome of Adventure Design for a fuller effect (as I already have it in my gaming library).