A beautiful and striking building. The huge arches that can pass through large vehicles at the bottom occupy half of the street; the four-story exterior wall, with a gold-pointed Swiss clock; the top of the spiky towers straight into the clouds. The prison was originally built as a prison for prisoners, so it was called the "jail tower". When the Bern city was expanded, it became the west gate of the old city. After a large renovation in 1979, it was used as a place for office and exhibitions. On the outside of the tower is a small square, and the Anna-Sail fountain is set up in the center of the square. People come and go, very lively. The prison tower is the only way to visit the old city. Cross the tower eastward, you can watch the clock tower in turn~ Einstein's former residence~ Xiongyuan~ Rose Garden~