The first image is the location of the Lush Cave. It's under a strip of Pale Oak Forest in-between 2 gigantic Snow Mountains.
The second image is a giant map of the seed I made, which is made up of 4 Level 3 Locator Maps arranged in a grid with Glow Item Frames. The spawn point is in the lower-left portion of the map. The 2 Waypoints in the lower-right portion are both Villages, and the waypoint on the very top-right is a 3rd Village.
The final two images are the inside of the large Lush Cave. It's so big that it's difficult to see all of it in one screenshot.
Seed: 1583866508
by KinglanderOfTheEast