Swampland

To travel to Swampland you need the Map installed on the Airship.

Make map pieces at Battlefield, take these home and make the Map in the Special tab of the Workshop.

Install the Map, do not just load it to the Airship

Follow the Questline, do not complete Catapults, take the Maya Calendar home, build the pyramid until quests direct you to do this.

There are 4 chests on this land. To open them you need the Keys from the Castle 'Jeweller's Village' adventure, therefore you do need your Castle to be finished.

Combo chop giant Skulls to get Snakes, you can get more from Castle Adventures if you need them but you should have enough if combo the giant skulls on the land.

The land is rich in Red Marble, Clay (from the swamp ponds) and Gold. Clay and Gold also can be found with Compasses and Geologists.

There are hidden bandits on this land, right in the middle of the land, you do need to clear the ponds there to find the bandits.