Stonehenge standing tall on the Salisbury Plain is probably what first comes to mind when you think about monuments and the solstice, the giant rock formation was constructed by prehistoric worshippers beginning about 5,000 years ago.
There are fascinating monuments all around the world. A modern one I would love to see is the Sun Tunnels, in Utah.
In 1976, artist Nancy Holt built the massive “sun tunnels” in a valley in the Great Basin Desert, in Utah. Nine feet high by 18 feet long, the four 22-ton concrete pipes are aligned with the setting and rising suns of the summer and winter solstices, acting not only as a shelter from the sun, but also as a viewing platform. The tunnels are pierced by holes of varying sizes which may at first seem like minimalist modern art, these actually depict the pattern of selected celestial constellations; there is a tunnel for each of the constellations Draco, Perseus, Columba, and Capricorn.