The free pit at spectrum is worth digging. I would strongly suggest doing the $175 pile and then spending the rest of the day digging the free pit. The picture of the stones is from the free pit- one man digging for about an hour and the $175 pile one man sifting for about four hours. Also the 175 pile yields more stones than what's in the picture and it took about 4 hours for 1 man 3 women to sift it. NEED BETTER MAP/SIGNAGE TO GET THERE!!