It Can Happen - A Lost River

The Rio Perdito got a new name in November of 2009 - the Listara River. Here is a news report from Earth Times News:

Bogota - The Listara river in northeastern Colombia has suddenly disappeared into a geological fault, the authorities said in the town of San Andres. The mountain river was "swallowed by the earth" in a rural area about 800 metres away from the town of 9,000, in the province of Santander, town officials told the Colombian radio station RCN late Sunday.
Experts in Bogota about 400 kilometres away were called upon to investigate the phenomenon and to establish whether the fault entails a threat to the town.

Henry says there are four places in Columbia called San Andres. As the report mentions, this is a small town in the province (or county) of Santander. There another one in a different province. There is a Colombian island in the Caribbean with that name, and it is in a province of islands also called San Andres. Confusing, no?