Introduction to the Monument to those who died in the line of duty building Keelung Port: In order to commemorate the workers who died in the line of duty while building Keelung Port, a monument to those who died in the line of duty was built on the hillside of Piers 3 and 4. It is divided into areas such as an approach path, a memorial square and a monument. Standing at the monument, you can overlook the scenery of Keelung Port, which is an excellent viewing location.