Obstructions at the beach

I love searching close to obstructions on the beach as they often lead to good finds, a giant boulder, a washed up tree trunk or even a pier may be an obstruction that can lead to a good find.
Obstructions break up the natural movement of surf and sand, causing lost coins, jewelry or artifacts to end up in the slip stream of the obstruction.
Some of my best beach and water hunting finds have come out of areas with an obstruction on the beach or in the water.
I know my local beaches like the back of my hand, I also know where many obstructions are at every beach.
I use large movable pieces of iron as jewelry traps, knowing the average beach or water hunter will go around large iron objects on the beach and inside the water.
Every few weeks I will move my jewelry traps and search the place they probably stayed since the last time I moved them.
I study the way water moves across my local beaches, then search close to and around any obstructions looking to detect anything diverted by an obstruction.
At beaches where the high tide washes up to a concrete barrier (Wall or building foundation) it is very difficult to detect close to the concrete barrier.
At areas I know jewelry is lost, I will often change to a small search coil so I can detect closer to the wall.
I use my scoop to drag sand away from the base of a wall, beach hunting is not all about swinging a search coil sometimes you have to use other tools like a spade or a rake to help you ferret out good stuff close to obstructions at the beach.
Obstructions are just that to the majority of beach and water hunters, nuisances to go around. 
Obstructions on the beach and in the water help break up the natural movement of surf and sand.
In areas you are likely to recover jewelry, coins or old artifacts, obstructions become areas where the stuff you are searching for collect in numbers. 
Remember the more difficult an area of the beach is to detect, the more likely you are to find something.

There are three potential traps in this photo, the wooden bridge, tree branch and vegetation mid slope preventing stuff from being washed higher.