Later in the morning we drove about 15 miles south to Parker Dam. Parker Dam is the deepest dam in the world. Only the top third of the dam is visible. In order to hit bedrock engineers had to go down 235 feet. A road crosses the dam but only cars and pick-up trucks are allowed to do so. Since the Colorado River is the boundary between Arizona and California when we crossed the dam we were in California.
Below the dam along the Colorado River, there is an area called "Parker Strip" that includes RV resorts, parks, restaurants and even a beautifully manicured golf course with real grass. Green grass in this desert environment is a real oddity.