As I've been traveling around Subeta using the world map I've noticed it can sometimes be challenging to traverse areas/get back to an area.

For example, if you visit https://subeta.net/explore/underground/root_forest.php there is no way to get back to the Underground. The Underground also doesn't provide you with a way back to Shadowglen.

I think it would be great if location based places had a way to travel back to their main location! Whether that is just a textual link or whatever that may be. :)

If you click the lower right path area of the underground root forest you can get back to the underground home/index page. I don't think it has a way back to Shadowglen though. A little text link underneath probably wouldn't go amiss c:

I encounter this sort of issue fairly frequently whenever I do Shinwa's quests. After you're finished, clicking on the "set alert" link takes you to an error page with no way to get back to the Sacred Lands. Since I do the Wizard's quests right after Shinwa's, I would personally get a lot of use out of a "back to the Sacred Lands" link on that page. Actually, I think all the shops, quests, etc. could benefit from a "back to (whatever land they're in)" link.

I've encountered this several times in various places. It is very annoying.

Agreed, I hate when I run into these pages and sometimes, it's just unnecessarily complicated.