Once every year, placid Ulm transforms into a vivid, loud (and wet) party zone. This special day in Ulm is celebrated since the 14th century and it marks the end of the annual oath taking week. It's called "Schwörmontag": oath taking Monday (learn more in this short video, if you're interested). Anyway, one of the most fun aspects of the city's celebration is the "Nabada", which, roughly translated, means: bathing down the river. Imagine thousands of people, tubing on the Danube on anything that floats, and forming a gigantic, colourful water parade. Compare it to the Fiesta San Fermin in Spanish Pamplona or La Tomatina near Valencia. If you'll ever have the chance to see it: the Nabada usually takes place on the third Monday of every July.