This area is where Ventra's Tomb is located. In here, we'll meet Nadine for the first time in Nexomon: Extinction. As with many other areas in the Drake Isles, some parts are only accessible after we receive the ability to control wind from her.
These are found on the northern grass, depending on the level of the player:
These are found on the southern grass, depending on the level of the player:
These can be found after completing The Extinction Project side quest: