There are 4 tiles on the bottom level, which lead to 4 small rooms, a strong monster and usually some good loot. There is an amulet in one of the rooms that I used for the rest of the game (though I was tempted to change it a couple times). For all the trouble I had with the spider, it didn't drop anything and there were just a couple gems in the room. <img src="/ubbthreads/images/graemlins/memad.gif" alt="" />
Catacombs, level 5