Denton Bridge is the only bridge between Banjul and Serrekunda so it has a police check point to provide tight security. It crosses over Denton Creek which is really just an offshoot of the Gambia River. People do surf fishing from the nearby beach and it is also safe for swimming. This photo shows the old bridge which is no longer used except by fishermen and, to the right, the newer bridge.
According to Wikipedia, "Serrekunda (or Serekunda) is the largest city in The Gambia, lying southwest of Banjul. Its population as of 2006, was 335,733 people. Although Banjul is The Gambia's capital, it is on an island and cannot grow further, making much of the growth in Serrekunda."