An updated link for "The Unofficial Elder Scrolls Guide." *Very* Comprehensive.
http://www.uesp.net/morrow/espmor.shtml
And here is a link to the site's page on finding artifacts:
http://www.uesp.net/morrow/hints/mwa...ts.shtml#rings
And, a very nice interactive map you can download: It seems to have every obscure tomb, ruin and cave marked upon it, and a whole lot more. All you have to do is select the desired location from a scrolldown menu, and "go." The map also allows you to zoom out, zoom in, and you can to have it show all three in-game fast travel options.
You need never be lost again
http://www.uesp.net/file.shtml?morrow/files/mim_hi.exe
Another extremely comprehensive guide with walkthroughs: The Beginner's Guide to Morrowind -
http://izhtex.com/tes3/