Cut the watermelon into small, ½" cubes and add to a large bowl.
Carefully cut the corn off the cob and transfer to the bowl.
Cut the cucumber into ¼"-½" cubes and add to the bowl.
Squeeze the lemon over the salad and drizzle with olive oil.
Add the salt and toss to combine.
Top with crumbled Feta and gently mix.
Serve as a summer side anytime you want to go on vacation.
