Classic no-brain action adventure entertainment.
It is sort of like a rip off of Indiana Jones, but without the solidity of good actors and a good plot.
The effects were impressive for their time, and I am pretty sure that this surly was not a cheap movie to make.
It is sort of a classic for the adventure movie lovers, and it is worth watching, but do not expect anything other than light entertainment and a lot of slap stick humour.