The world's largest hourglasses shared in a Wikipedia article
The world's longest-running hourglasses can take an entire year to empty their sand chambers, and you can learn about them in this Wikipedia article.
The Timewheel in Hungary, created in 2004 to mark the country's entry into the European Union, takes 12 months for a complete cycle. In Japan, the Nima Sand Museum has a 5.2-mete…
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