Without more context or information, it is impossible for me to determine which place is being described however, if you're trying to define the following places:

A. Bus stop is a designated area where buses pick up and drop off passengers.

B. Harbor is a sheltered area of water where ships and boats can anchor.

C. Train station is a place where trains stop to pick up and drop off passengers.

D. Airport is a facility that provides services for the landing, takeoff, and maintenance of aircraft.