Gust’eaux is located in Kuurne, a small Belgian town about 70 kilometers west of Brussels. The restaurant draws rave reviews for its signature mains, delicious nachos and refreshing sangria. But while finding nachos and sangria on the menu in a Belgian town of just over 12,000 might be a bit of a surprise… what fills your water glass may be an even bigger shock. It’s water from the restaurant’s sinks and toilets. With a little help from Ghent University, BOSAQ, and other water experts they set up an on-site purification system.