I have them stored in folders as below:
Child 1: state-province
Child 2: area
So far there are 34 "Country" folders, and some of these have up to 40 "State-Province" sub-folders, and some of those have 10-15 "Area" sub folders.
Arches National Park
Coral Pink Sand Dunes State Park
Dead Horse Point State Park
Escalante Petrified Forest State Park
Goblin Valley State Park
Green River State Park
... and about five more.
I've attempted to create a menu for this, but am bewildered on what sort of layout would cope with the large number of links.
My current attempt is a drop-down with countries listed across the top. However, given the amount of links in each state this is becoming cumbersome, and looks terrible on a page. Also there would need to be at least three-lines of links.
I've also tried one page with all links on that page, as per example above. That works well, but looks odd.
The above example of the USA is the largest collection of galleries, so the above example gives a fair idea of the problem.
(I also have a music section with over 1200 albums that I dealt with using a one page, alphabetical listing, with sub-pages for artists with more than one album. That worked, but my wife asked if there was any way to reduce the number of clicks in getting to her music of choice. So far I haven't thought of an answer, apart from "no".)
However, if that's what's necessary, I have the template ...
I don't think there's a right or wrong answer here, but would really appreciate your comments.
If you this far, many thanks for your perseverance, and hopefully your suggestions.