Just a thought here, many indians lived in cliff dwellings and you have the making of that. Choose a rock from bryce and make it a negative. Make your mountain a positive and group them. Transfer material and keep out the greenery. Then put some bricks in the cave. Make it elaborate and use the terrain to make your steps. Have fun. Heh, what a great idea, I think I'll do some cave dwellings myself. LOL.