Nature is often the inspiration for architecture and design. We've even seen our fair share of fully functional tree houses, but in South Africa there is an entirely unique, hollowed out tree called Sunland Big Baobab that has actually been converted into a bar. According to the pub's website, the venue is the widest documented baobab (a type of tree normally found in the hot, dry savannas of sub-Saharan Africa) and carbon dated to be around 6,000 years old.