EuroGraphics San Antonio River Walk 1000-Piece Puzzle. Box size: 10" x 14" x 2.37". Finished Puzzle Size: 19.25" x 26.5". The San Antonio River Walk is also known as Paseo del Río. It offers visitors an enticing network of walkways along the banks of the San Antonio River, one story beneath the streets of Downtown San Antonio, Texas. Strong high-quality puzzle pieces. Made from recycled board and printed with vegetable based ink. This superior quality puzzle will delight and educate all at the same time.