The 1410 clock on Prague’s Old Town Square, where the Twelve Apostles parade every hour and Death rings the bell.
Visit the Teide Observatory, one of the world's leading astronomical observatories located on Tenerife in the Canary Islands.
Nineteen masonry instruments from the 1730s, including a sundial accurate to two seconds.
Watch the sun rise along the Thirteen Towers of Chankillo, a 2,300-year-old solar calendar in the desert
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