We were looking for a family movie to see the other night, and came across the first Indiana Jones - kids had a blast watching it, and it turns out my wife has never seen it either. That first movie was really pretty great considering it is almost 40 years old now. We saw the second one yesterday night - and I don't know if I ever saw it before either - while the overall movie felt new, some things seemed familiar - but that's maybe because of all the pop references. The second one was quite a bit darker, and overall not as good as the first, but still very entertaining. We are planning to watch the third (which I'm sure I've seen a few times) in the next few days.
I think I will introduce my family to the goonies pretty soon too