Answer:
Ships passing through the Panama Canal must travel through Lake Gatun.
Step-by-step explanation:
Gatun Lake is a large artificial lake located in Panama, and is a key element of the Panama Canal, because it serves to transit ships along 33 km through the Isthmus of Panama.
It was created between 1907 and 1913 with the construction of the Gatun Dam on the Chagres River. In those years, Gatun Lake was the largest artificial lake in the world, as well as its dam.