Agreed. This could be said of many entries in the tech tree, not just the adventure/domination techs. Every entry needs a bullet point set of details about what exactly they do. Especially the ones that do something passive, like reveal resources.

That was (or still is?) a bug with adventuring techs for the Empire. It should be fixed now though.

It's not just Empire and it's NOT fixed.

I'm currently playing a Kingdom game with level 3 and 4 dungeons and chests all over the place. I have researched 11 levels in the Adventure tree. I have been level 2 for at least 6 levels of research.

What do I need to do to advance?

I'll keep this in mind as I'm moving techs around for my mods (i.e. This tech bestows NOTABLE LOCATIONS Level 2).  Adding seven words to the description is easy.

Of course, this'll only apply if you are using MY tech related mods mods, but perhaps you can get some of the other modders to add this notation as well.

As for Stardock's end, hopefully the right person takes note!