When I migrated from D&D to the Hero system, our adventures became much more character and plot oriented rather than hack & slash, shoot & loot mentality that a lot of the D&D modules have. D&D dungeons were often designed like a series of deathtrap puzzles with minimal rhyme or reason, and while that is fun on some levels, it lacks depth. I still use some of the interesting bits of D&D modules as inspiration, but wouldn't adapt one directly into Hero.
If you are looking for inspiration, something that is intriguing but would require fleshing out, check out the One-Page Dungeon contest entries. They run the gamut from wacky to serious, and from basic to fantastic, but there are a lot of good ideas. You can find them here: https://www.dungeoncontest.com/