Here is the spot! El Mitad del Mundo, the middle of the world and the actual equator line, at the highest point in the world. Thumbs up is the traditional pose here, as you are actually lighter on the equator by a couple of pounds :)
They did a demonstration showing how water drains straight down on the equator, and spins (the Coriolis effect) clockwise and counterclockwise within 6 feet of the line!!