Semuc Champey

Semuc Champey is a natural enclave in the department of Alta Verapaz, Guatemala, it consists of a natural 300-metre karst landbridge formed by travertine limestone deposits, beneath which the main flow of the Cahabón River plunges into a subterranean cave system via a natural sinkhole. Located near the Q'eqchi' Maya town of Lanquín, the top of this limestone formation features a stepped series of... (Wikipedia)