No other tennis court in the world has quite the view (or drop) as the one at the Burj Al Arab hotel in Dubai. Located more than 650 ft (200 m) above ground, the hotel’s grass helipad was converted into a 4500 sq ft (415 sq m) tennis court to promote the Dubai Open back in 2005. Longtime rivals Andre Agassi and Roger Federer had the opportunity to play on the court and even fired a few balls off the edge.