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Most of Rio San Antonio Cruises' river barges are about 20 years old. Photo by Kathryn Boyd-Batstone.

Most of Rio San Antonio Cruises’ river barges are about 20 years old. Photo by Kathryn Boyd-Batstone.

Most of Rio San Antonio Cruises’ river barges are about 20 years old. Photo by Kathryn Boyd-Batstone.