a tower made of suitcases
a stack of suitcases
a tower of suitcases
many suit cases stacked on top of each other
Very tall stack of luggage
An enormous cart of luggage.
A stack of luggage nearly reaching the ceiling.
An immense pile of luggage on a cart in an airport.
LOST LUGGAGE AT AIRPORT TERMINAL
stack of luggage
tower of luggage 
a large tower of luggage is going down from the ceiling at an airport with a cart filled with suitcases