Missouri

This beautiful steel structure, which is located only a few miles from where Lewis and Clark embarked on their epic journey, is part of the Jefferson Western Expansion Memorial. Standing near the intersection of two major freeways and with a height, as well as a base width, of 630 feet, it's the tallest monument in the nation, and its unique design is a marvel of modern engineering. What many people may not realize is that there's more to The Arch than the arch. This offbeat steel structure, which is located only a few miles from ...