Riyadh, Saudi Arabia. If the Planet earth ever required an enema, the tube would be inserted there. To imagine a slip in Riyadh, just hail a cab, ask to be taken to your local police station, and then ask the friendly copper to lock you up for 5 days. In their tumble drier.
Best thing for that vile place would be a 50 Megaton airburst. Actually, make that 100 Megatons, just to be sure.
Nowhere else does "V1" sound so sweet...
£6