Valley of the Moon ... Go back to the time of "eras" and "periods," and enter the world of the Triassic, the first period of the Mesozoic Era. Just as we hold on to your childhood treasures, Ischigualasto has held on to memories of those times. Millions of years later, the movements and collisions of the tectonic plates has opened that which was once covered my thousands of feet of young rock, essentially opening a chest of memories. The Ischigualasto Basin tells the story of what happened at a unique time on Earth. No one could imagine that a huge lake surrounded by lush vegetation and thriving animals would one day turn into a desert with low rainfall, strong winds, and high temperatures.