Due to the thick layer of fen and clay present in the soil of the city, all the city's buildings were erected on wooden poles that are fixed into a sandy layer of the ground over 35 feet deep!
View moreThe four Grand Slam tournaments (also referred to as the Majors) are especially popular: the Australian Open played on hard courts, the French Open played on red clay courts, Wimbledon played on grass courts, and the US Open also played on hard courts.
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