Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
Abbott and Costello were the most popular comedy team of the 1940s and 1950s. They're probably most famous for their "Who's On First" gag but they also starred on radio and television and made many very successful movies. This is one of their later movies. It's a somewhat dated comedy that spoofs The Mummy and other such tomb-raider horror/adventure films. It's about a hidden Egyptian tomb with 4-thousand-year-old mummy filled with lost treasure, greedy people who want to find the treasure, and an ancient religious sect that worships and protects the mummy and the treasure. And Abbott and Costello are mixed up in all of it. It also stars one of my favorite hard-boiled film noir dames, Marie Windsor, as the villainous Madame Rontru. There are also a couple of good dance routines, a nightclub torch song, and some good snake charming scenes. And there's even a gigantic lizard monster thrown in. When Costello is running from the mummy in the temple, he encounters an enormous Green Iguana with a giant tongue. He runs to escape it, but accidentally follows it into a room and shuts the door behind him. The next thing we see is Costello exploding through a brick wall to get away from the lizard.
The lizard is a real live Green Iguana which has been enlarged in size on film to make it look like a monster.