Heathen - Not a dungeon crawl, and a pretty interesting story. A paladin leader leaves to destroy an evil cult. He never returns. You travel in search of him, hoping to save him, only to learn he is now the new cult leader. Plains, villages, forests, rivers, mountains, temples. The PC's have a paladin, so it tied well into the story. Before we started, I built up the Paladin leader and had the PC's tell me their relationship to him -- all were really glowing. It has made the mystery and rising doubts as the PC's hear vague rumors even more interesting.
http://www.dragonavenue.com/dnd/post/heathen_an_official_4e_dnd_adventure/
Generally, I dislike modules, but I'm DM'ing five (yes five) different games every week (as part of my job). This takes a huge mental toll trying to keep fully prepared and even more difficult remembering the intricacies of each campaign. Thus, I tried using a module.
I read through many, many to get one I liked. Most had something interesting, but nothing that made me feel pulled into the story. I was pretty surprised how difficult it was for me to find a decent module [this may have more to do with my lack of experience using modules and thus not being able to translate the reading of it into understanding how it might work with any of my groups.]
Another post here asking for best low-level modules had many people recommend Heathen, which is why I read it. I liked almost everything about Heathen and am halfway through the module and still like it.
Still, I've had to (or maybe I've just been unable not to?) change many things, and b/c of this, I'm wondering if it might be even easier just going with my own story b/c since it came from my own mind, it's easier to remember.