I've been to the equator in Ecuador. It was clever how the "museum" made everyone think that simply by walking 20 yards north or south equator that the water would drain differently. They had a rectangular basin with a drain in the center. When we were in the northern hemisphere, they poured the bucket so it would induce a clockwise swirl, and counterclockwise in the southern hemisphere. When were were on the equator, they just poured it right in the center so no swirl was induced.