CAVE OF SWALLOWS
This enormous cave is surrounded by dense vegetation, typical of the Huasteca Potosina region. 512 meters deep and 60 meters wide, with a freefall of 370 meters, the Cave of Swallows is the second largest pit cave in Mexico and amongst the largest in the world. Its limestone walls provide refuge for thousands of birds, including white-collared swifts and green parakeets, which flock from their nests every morning, circling up to the surrounding forests in search of food, only to return in the same manner in the evening.
This spectacle takes place every day at sunrise and sunset and therefore it is recommended that you visit in the morning or in the evening.