The Hoover Dam is a concrete arch-gravity dam located on the Colorado River, on the border between Arizona and Nevada in the United States. It was constructed between 1931 and 1936, and it stands 726 feet tall and 1,244 feet wide. The dam's purpose is to provide hydroelectric power, flood control, and water storage for the southwestern United States. The dam is a popular tourist attraction, attracting over 1 million visitors annually. It is also recognized as a National Historic Landmark and was listed on the National Register of Historic Places in 1981.
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標準授權 | XS | 480 x 320 | JPG | 13 | |
標準授權 | S | 800 x 533 | JPG | 15 | |
標準授權 | M | 2121 x 1414 | JPG | 18 | |
標準授權 | L | 2738 x 1825 | JPG | 20 | |
標準授權 | XL | 3464 x 2309 | JPG | 22 | |
標準授權 | MAX | 5376 x 3584 | JPG | 23 | |
標準授權 | TIFF | 7603 x 5069 | TIF | 39 | |
進階授權 | WEL | 5376 x 3584 | JPG | 88 | |
進階授權 | PEL | 5376 x 3584 | JPG | 88 | |
進階授權 | UEL | 5376 x 3584 | JPG | 88 |
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標準授權 | 480 x 320 px | JPG | 13 點 |
標準授權 | 800 x 533 px | JPG | 15 點 |
標準授權 | 2121 x 1414 px | JPG | 18 點 |
標準授權 | 2738 x 1825 px | JPG | 20 點 |
標準授權 | 3464 x 2309 px | JPG | 22 點 |
標準授權 | 5376 x 3584 px | JPG | 23 點 |
標準授權 | 7603 x 5069 px | TIF | 39 點 |
進階授權 | 5376 x 3584 px | JPG | 88 點 |
進階授權 | 5376 x 3584 px | JPG | 88 點 |
進階授權 | 5376 x 3584 px | JPG | 88 點 |