Visualizing 1 Million gallons of oil

1 million gallons is equal to the following:
Area of a tennis court filled 48 feet high of oil
Area of a NBA tennis court filled 28.5 feet high of oil
Area of a NFL football field filled 2.3 feet high of oil

A million gallons takes up a lot less space than people think. I would
bet that the estimation of the oil in the gulf is much higher than
their estimates based on the visual images I see.