The caves are formed from limestone that dates back to the Cretaceous period.
The underground river that traverses the cave system remains active throughout the year.
The descent involves a vertical drop of several hundred meters via staircases carved into the rock face.
The cave temperature remains relatively constant year-round, regardless of external weather conditions.
The local ecosystem inside the cave includes specialized troglobitic species adapted to total darkness.
The name 'La Estrella' refers to the specific shape of a rock formation found within the main hall.
The cave system serves as a natural drainage point for the surrounding mountainous watershed.
Grutas de la Estrella is a natural cave system located in the Sierra de Teloxtoc mountains, characterized by massive limestone formations and an active underground river. The cavern features extensive stalactite and stalagmite displays known locally as 'The Throne,' 'The Pulpit,' and 'The Mammoth.' Visitors descend approximately 450 concrete steps to reach the lower chambers where the subterranean river flows. The geological structure is part of a larger karstic formation in the State of Mexico. Lighting systems have been installed throughout the path to highlight specific rock textures and mineral deposits. Natural erosion has carved out large vaulted ceilings that reach significant heights within the main halls. The site is managed for tourism with guided paths to preserve the integrity of the speleothems. It sits at an elevation that provides a cooler microclimate compared to the surrounding lowland areas.
The main hall balcony offers the widest panoramic view of the stalactite clusters.
Wear shoes with high-grip rubber soles, as the stairs and paths can be damp and slippery.
Bring a light jacket, as the humidity and temperature inside the cave are lower than the outside air.
Use a headlamp or flashlight if you want to inspect details in areas where the ambient lighting is dim.
Avoid wearing sandals or flip-flops, as the steep staircase and moisture make them hazardous.
Closed on Mondays for maintenance and geological monitoring.
Do not touch the stalactites or stalagmites, as natural oils from human skin damage the mineral growth.
