what sport events are entertained at the river?
Sailing, rowing, skiffing and kayaking, to name a few.
River Thames
Sailing is practised on both the tidal and non-tidal reaches of the river. 
what was the tower of london originally used for A royal residence. where is it located? On the north bank of the River Thames in central London. when was it built? End of 1066. what is its structure? The structure was originally three storeys high, comprising a basement floor, an entrance level, and an upper floor. what do ghosts have to do there? A sentry on guard outside the Jewel House claimed to have witnessed an apparition of a bear advancing towards him and a tubular, glowing apparition was claimed to have been seen in the Jewel House by the Keeper of the Crown Jewels, Edmund Lenthal Swifte. what human intervention can we see at the river mentioned above? A variety of structures connected with use of the river, such as navigations, bridges and watermills, as well as prehistoric burial mounds why is there a need of life boats? Because the river claims a number of lives each year.
wiki:11590486
River Thames [SEP] Sailing
Sailing is practised on both the tidal and non-tidal reaches of the river. The highest club upstream is at Oxford. The most popular sailing craft used on the Thames are lasers, GP14s and Wayfarers. One sailing boat unique to the Thames is the Thames Rater, which is sailed around Raven's Ait.