The BMW Welt is a combined exhibition, delivery, adventure museum, and event venue located in Munich's district Am Riesenfeld, next to the Olympic Park, in the immediate vicinity of the BMW Headquarters and factory. It was built from August 2003 to summer 2007. A solar system with 800 kW of power is installed on the roof of the main building. The opening took place on 17 October 2007. The BMW Welt is the most visited tourist attraction in Bavaria.