What you are seeing here is the highest tennis court in the world. It is built at the top of the Burj Al Arab hotel in Dubai. The court is more than high. It was first a grass helipad but it was converted to a tennis court to help promote the Dubai Open.
This looks very nice, but I don't play tennis. But, half the court & badminton - that could be fun! We played in the streets of Queens because our room was limited, but I still have affection for the sport. Add to list.