The tallest monument can be found in St Louis, Missouri, United States. The Gateway Arch was built as a monument to westward expansion in the States. It is 192 metres, or 630 feet tall.
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From @flourishone
The tallest monument can be found in St Louis, Missouri, United States. The Gateway Arch was built as a monument to westward expansion in the States. It is 192 metres, or 630 feet tall.