Virtual tabletop dungeon inspired by the classic adventure Return to the Temple of Elemental Evil. It's intended for online play but it can be printed out and used on the tabletop.
The digital download includes 27 maps!
The maps are designed with a 5 ft. grid, but there is also a gridless option included. The dimensions of each map are in the bottom left corner.
If you want to print it out there are some great guides online for that. Search for "print dungeon maps".