Here’s a tutorial on making modular terrain from interlocking foam floor tiles.
modeling
Building An Aztec Gateway
Jeffe Koppe describes his efforts in building an Aztec Gateway.
Building An Inexpensive Game Board
Here’s an instructional video on building an inexpensive game board.
Modeling Trenches
Here’s a video tutorial on modeling trenches.
Making A Mammoth Cave Terrain Centerpiece
Ludstuff has a nice photo essay on buillding a large cave terrain centerpiece. Inspiring.