I have to try some of these out. Also, technically in the first tip you're forming a square, but the general idea is that you're ending up in the same place you were before. Pinner: You Guys Asked For More And So Here's More Life Hacks"
‘The Center of the Universe’ is a circle on the ground in Tulsa, OK. The broken concrete is surrounded by a large circle of bricks, but you’d probably never notice it unless you started talking while standing in the middle. There, you’ll hear your voice loudly echoing back at you, and nobody outside the circle will hear a thing - but nobody knows why. Source