The Lost city of Barakus is a good site-based adventure for low level. At all, more than 30 quests are located inside and around the city of Endhome, including the entrance to the lost city, Barakus.
The campain give many opportunity to give to the PC many non-combat encounter witch is why I love the low-level character. Who said being a merchant or a wizard student is boring after all? But don't get upset, as the level goes by, they'll have there hand full of goblins, bandits, orcs, aranea, zombies and even a dragon or two.
The DM have some work to make this campaing more plausible or to hook the PC to some quest, like the wizard's tower or the Pulanti Estate, but still, it is playable "as-is". The maps are a little confusing but, with a bit of preparation, everything is here to make Endhome, the wildeness, and it's many dungeons a place alive, full of surprises and of interesting finding.
There is more than three weeks we're in it, and we still enjoy it!