Is 'The 37 hectares (91 acres) of garden are set on lands above the Wag Wag River, which twists through a steep and narrow valley.' an autonomous statement, not logically connected to 'The nine hundred acres of garden are set on the lands above the Nile River.'
The 37 hectares (91 acres) of garden are set on lands above the Wag Wag River, which twists through a steep and narrow valley.###The nine hundred acres of garden are set on the lands above the Nile River.