There are many things to see, and one of the most impressive is the construction and decoration of churches. We are talking major ornamentation here that is mind-boggling in its detail and quantity. The Cathedral de San Francisco is a good example. A second item of interest is the money changers that infest the major streets. They wear special vests and hold onto large handfuls of cash. Apparently several at each intersection and more in mid block. They exchange currencies and make their living on the exchange rate.