Dungeons

Dungeons are open undergrounds with rich different architecture styles. Most of them are historical builded by previous civilizations.

In dungeons players compete with different type of mobs which are rare outside of undegrounds. That's one reason why players may want to enter dungeons. Another is exploration of previous civilizations and their treasures or secrets.

In most dungeons is also raid boss on their ends.

Dungeons are also open world, so you may fight with others there.