The Eilenriede (literally 'alder marsh' in German, meaning 'marsh populated with alder trees') is a 640-hectare (1,600-acre) municipal forest in Hanover, Germany. It is the largest urban city forest in Germany, one of the largest in Europe, and is nearly twice the size of Central Park in New York. The biggest German urban park in the strict sense of the word, however, is the 375-hectare (930-acre) English Garden in Munich.
River surfing is the sport of surfing either standing waves, tidal bores or upstream waves in rivers. Claims for its origins include a 1955 ride of 2.4Â km (1.5Â mi) along the tidal bore of the River Severn.
River surfing on standing waves has been documented as far back as 1972 on an artificial wave created on a section of the Eisbach man-made river, a side arm of the Isar River, near Haus der Kunst in the Englischer Garten park in Munich, Germany, today offering the world's largest urban surfing spot.