Generate a massive Minecraft fantas...

Generate a massive Minecraft fantasy valley inspired by an ancient lost civilization. Scale: 1500x1500 blocks. Terrain layout: - The entire western side of the map is dominated by a gigantic cliff wall reaching 180-250 blocks high. - At the northern center there is a circular spring lake carved into the cliffs. - Water flows from the spring through multiple large stepped waterfalls. - The waterfalls descend into a vast central valley. - The valley contains shallow turquoise rivers, branching streams, small islands, and natural terraces. - The terrain should feel open and monumental rather than crowded. Landmarks: - Northeast region contains a field of giant stone monoliths. - Monoliths are 80-180 blocks tall. - Monoliths are spaced apart naturally, not clustered tightly. - Southeast r