The most striking feature about the location of Vijayanagara is the natural basin formed by the river Tungabhadra which flows in a north-easterly direction. The surrounding landscape is characterized by stunning granite hills that seem to form a girdle around the city. A number of streams flow down to the river from these rocky outcrops. In almost all cases embankments were built along these streams to create reservoirs of varying sizes. As this is one of the aridest zones of the peninsula, elaborate arrangements had to be made to store rainwater and conduct it to the city.

What is the name of the foreign traveler who wrote the following lines about a tank constructed by Krishnadeva Raya?
"The king made a tank at the mouth of two hills  so that all the water which comes from either one side or the other collects there..."

Paes

Paes wrote- "The king made a tank at the mouth of two hills  so that all the water which comes from either one side or the other collects there; and, besides this, water comes to it from more than three leagues by pipes which run along the lower parts of the range outside."