How to make interesting dungeon crawl in BitD?

I usually steer my party into dynamic social/political/violence jobs, which gives me a lot of chances to pull in their backstories and political drama into our missions. But I GM'd myself into a corner, and now the crew decided that their next job would be exploring an ancient tomb. The tomb is in an isolated part of the world and theoretically hasn't been touched for millennia. I'm trying to figure out how to make this interesting and not just a dry archeological dig.

We're playing in a homebrew world. There could be traps or weird technology or mutated monsters down there, I guess? I'm open to any ideas.