I love looking for treasure as well and when I watched Indiana Jones I dreamt of becoming a treasure hunter/ archeologist.
We have a local lore called the Yamashita Treasure where a Japanese General was said to have looted and amassed gold bars from countries that Japan and hid it in a cave in Bataan/Cavite in the Philippines.
The location in our country changes.
It was said to be booby trapped with poison gas and the workers who helped transport it were killed to silence them and the soldiers sealed in the cave making them ghostly sentries.
I think it was made in a movie.
It sounds like it would be a great movie! It also sounds like it might have been included in the plot of one of Cusslers books. He tends to take stories from lore like that and weave them into his books.