i have the "gift" where i can witch it and locate underground utilities. most people think it's hokus-pokus bullshit but it works every time, gas, water, electrical and drain lines - i can find them all. it's easy to get a general idea of where the utility should be based on where it comes into the house and where the service main line is and from there it's just a matter of a few minutes to find the line.
i recently mystified reductimat by finding the drain line under his basement concrete slab.
Luck is what happens when preparation meets opportunity ~ Seneca