These don't really compare, but I'm pretty proud of two tarantula enclosures I recently set up (no tarantulas pictured, arachnophobe safe!)
My little Haploclastus devamatha (psychedelic earth tiger) was getting stressed out and defensive in her supposedly correctly-sized tank, so I managed to find a 8"x4"x4" pasta container and converted it to her new home. She immediately dug down about five inches into the soil and began constructing an elaborate web tunnel nearly reaching the top - you can see it on the right there. She also set up a large platform there disguised with moss and dirt where she lurks and waits for prey - the small floor area means prey insects are more likely to wander up there eventually where she can grab them. Watching her expand and repair the whole setup is mesmerizing - she spends hours every day working on improvements.
Here is the girl herself so you can see her "psychedelic" colors changing with the light:
My OBT was just moved into this better setup, with plenty of clutter and twigs to use as web anchors - hopefully I'll have an update where this is just covered in webbing, but it's already weaving webs between the twigs and then carrying leaves and moss to cover it in a sort of thatched wall, which is very cool.
Sorry for the iffy photography, I haven't gotten the hang of shooting through acrylic into such a small enclosure!