1100ad.wikia.com/wiki/Cities and Locations

Adventure Huts
are special locations on the valley map where you can win a prize by exploring the building in the center.

Adventure Huts
are special locations on the valley map where you can win a prize by exploring the building in the center.

Temporary Huts
adventure huts emerge in the valleys. You cannot enclose them in a contour and they will only be there for a certain amount of time after which they will disappear and reappear somewhere else. Within the adventure hut will be the appropriate building that you can explore and get something useful.

Mercenary Camps
are special locations on the valley map that can be captured to obtain more mercenary points (Glory Points) and the ability recruit a discrete number of mercenaries that are unique to that particular camp. The mercenary camps can also be built anywhere in valleys with the exception of the areas within a contour.