Grutas Tolantongo is located in the state of Hidalgo, a place known for its hot springs. In Grutas Tolantongo you can see the mother of all thermal springs in the area because it is said to be where the springs have originated. You’re probably asking right now what’s so special about the hot springs in the area? Well, what you’ll see there is no ordinary body of water. The water comes from a cave, forming a spectacular pool. To top it all off is a majestic waterfall.