The largest waterfall in Ecuador, The San Rafael waterfall on the Coca River, has mysteriously vanished. The fall, which was a popular tourist attraction, has disappeared after a sinkhole swallowed a part of its water. According to NASA, it's been replaced by three streams and has been taken off the country's travel website! While there are no plans to reconstruct the fall, the reason for disappearance is still unclear and the Ministry of the Environment in Ecuador has launched an investigation. Some experts suggest that it may be due to the construction of a hydroelectric plant in the area.