As do I. There is a player made location within the mod known as Falskaar that blew my mind. That mod itself is somewhat mediocre, but huge. But the location starts with you visiting a monk who sends you off to find a book. Eventually that lands you heading in to a place called Watervine Chasm, in what appears to be a small and standard bandit cave exploration. But then you kill the very first bandit and find information on him that he’s the first one sent back to guard the entrance, because it appears the bandits have found the motherload deeper down the path.
Naturally you explore further, and as you do it slowly becomes more of a Nordic ruin location, with huge caves containing large buildings and ruins as well. Quite some distance in, you stumble into a huge chamber with an underground river. At the end of this you find a door, leading to yet another dungeon, the Halls of the Dead.
At this point you’re linking into a full on Draugr ruin, and like the previous location, it’s full of large areas with large encounters and a mini-boss battle that throws quite a bit of a fight your way. But after killing the mini-boss, you realize there are stairways leading down, so onward you go.
The stairs eventually lead down a path that leads to a door to yet another location, the Ruins of Vizemundsted, a full-on Dwarven ruin location. Again you fight your way through multiple enemies and eventually a final boss whereupon you finally find that book you’ve been searching for, and, quite thankfully, a lift that takes you straight out of the dungeon. You emerge some halfway across the map of that already huge island the mod is based in.
It took me literally a day the first time I played through that, as it was an Inception-like dungeon within a dungeon within a dungeon. I probably swapped out my inventory 20 odd times trying to balance what the best loot was I could hobble around with prior to finally getting out of there.
It was incredible. I only wish the rest of that mod had been a little better overall, but it highlighted just how fun and white knuckle the dungeon setting within Skyrim could be.