ok movie from the late 70's or 80's fantasy / sci fi

[miltonflguy]

OK this movie was from ether the late 70's or 80's fantasy / sci fi. the only thing i can remember is it was a young lady hires a guy to help her find her father. I think the father was an Archaeologist.  The girl and guy go looking for him in a desert like place and find this cave. they go inside and there is a underground city/lair and they are attacked by amazon like warriors all female they hold the girl and they strip the guy naked as they had never seen a man before ( what i remember was that it was odd to see a man fully naked in a movie) then the head person in charge came in . that is all i can remember of this . I do know it had a kinda Flash Gordon feel to it once they got into the underground place. this has been driving me crazy trying to remember this movie so any help would be great.   

[Javakoala]

Perhaps The Perils of Gwendoline in the Land of the Yik Yak?

http://www.youtube.com/watch?v=u7swFDSUmOU

[Rev. Powell]

Or ALIEN FROM L.A.

http://www.youtube.com/watch?v=z-SclSgWSa4

Not sure about the nude scene but some of the other details match (underground city, archeologist father).

[Javakoala]

I thought the same thing, Rev, but the nudity made me think otherwise.

Now, if the OP had said, "The lead female has the most irritating voice ever!" then I would have went with "Alien From L.A.".