So, I keep seeing statues here and there. What is with them? I can't attack them, searching around them doesn't yield results...What are they for?
Statues are obstacles which only light can pass through. You can thus see past them, but not move or throw things past them. Breaking a normal statue with a staff of tunneling or a scroll of shattering does not appear to yield anything special.
They're mostly a flavor element, like carpets and bones and such. They sometimes serve as a warning, and sometimes even a trap.