A tennis court under water?
A Polish architect named Krysztof Kotala has released a design for an underwater tennis court in Dubai. I truly believe that they will carry out the architectural design and build the first tennis court under water! Because: Dubai currently has the highest tennis court in the world. The biggest challenge is to make a curved glass sheet of 30+ meters wide that also will be strong enough. Dubai is crazy enough to realize it and the cost price will certainly not be a shame!