Where can I find aquarium rocks?

[Sillyfishies]

I need some smooth circle rocks. Can I buy these somewhere?

 

[Sillyfishies]

Or what else can I use to make a cool cave

 

[DragonFish71]

I go to my local landscaping supply. They have piles of different sizes you can sort through to get what you want. Some people walk the rivers/streams near them and pick rocks.

 

[Sillyfishies]

I found a really cool piece of driftwood but my dads convinced I can't put in my aquarium and its too big to boil