Hard to believe, but I hadn’t yet chosen David Hall’s Tolkien-themed Dwarven Fortress as my Pick of the Day! I am rectifying that oversight now.
Pictures do not do this sprawling experience justice; you really do need to visit this experience in-world and wander around to appreciate all the work David put into this.
On a previous visit (we came here during an episode of Atlas Hopping with Berry and Drax), I remember David telling us that these structures were originally designed for an underground Mines of Moria, which he then later decided to place above-ground, at night. A full moon in a cloudy sky shines over the complex. Everything adds to the air of mystery: where are the dwarves?
If you haven’t been yet, I would urge you to come visit and explore Dwarven Fortress.