Rotten Row is a wide pathway coming along the south side of Hyde Park in London. In 18th century it was a popular place among high-society Londoners to take horseback rides and to socialize at. Nowadays it is mainly a place where one can practice a horse-riding. It was founded in 17th century by William III. "Rotten Row" is quite a common street name in England and Scotland - it is used to describe a locality that used to be filled with rat-infested houses or cottages.