One of interesting features in the unique Sistema Zacatón karst field is Poza Garapata.

Sistema Zacatón is an area with incredible characteristics unparalleled in the world. In total area contains some 20 unusual features – sinkholes, caves, springs created by deep groundwater heated by volcanic processes. Karstification processes here continue today as well – acidic groundwater continues to strip away the limestone and deposits it in unusual travertine formations.

Sinkhole with secret

Surface of Poza Garapata – a rounded sinkhole – is covered with dense vegetation. It is hard to access – sides of the sinkhole are steep and covered with even more dense, thorny vegetation. As it is usual in the thickets of Sistema Zacatón, there are many ticks – hence the name of sinkhole.

Most likely the even bottom if this seemingly simple landmark is just a few meters thick layer of travertine with an enormous body of clear water below it – not too far is the unique Poza Seca – very similar sinkhole covered with travertine lid and hiding unknown organisms in the water below it.


  1. Marcus Gary, Poza Garapata, Sistema Zacatón, research homepage. Accessed in the 23rd June 2010
Poza Garapata on the map
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Location, GPS coordinates: 23.0062 N 98.1647 W
Categories: Sinkholes, Ecosystems, Lakes and streams
Values: Geology, Biology, Unexplained
Rating: 1.5 out of 10 stars
Where is located? North America, Mexico, Tamaulipas, southern part of the state, 14 km north-west from Aldama town
Depth: ?

Landmarks of Mexico

El Castillo pyramid, Chichen Itza
El Castillo pyramid, Chichen Itza / , Flickr / CC BY 2.0
Few countries of the world can offer such array of unique and astounding attractions as Mexico.

Area of this country was cradle of several highly developed indigenous civilizations and some regions in the country are dotted with remnants of ancient cities with temples, palaces and pyramids.


World's deepest sinkhole - Xiaozhai tiankeng, with tourist route visible
World’s deepest sinkhole – Xiaozhai tiankeng, with tourist route visible / Brookqi, Wikimedia Commons, public domain
Category includes outstanding sinkholes – large natural depressions or holes, which for most part represent collapsed caves.

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