To add to the mystery, no one is actually sure when they were built. Located at several sites scattered around central and Northern India, it’s been estimated the colossal astronomy instruments were constructed as early as 1710. But is it just us, or do these structures look like they came straight off a Star Wars set?
You can find the world’s largest sundial at Jantar Mantar Observatory in Jaipur, one of the five outdoor observatories built by Maharaja Jai Singh II (this guy ↓), who ruled from 1699 to 1743.
Just at the Jaipur site alone, are nineteen futurist architectural instruments that are now counted as a UNESCO World Heritage site. The 73-foot-tall sundial has held the world record for over three centuries.
Looking more like futurist Brutalist-era structures, they’re unlike any other astronomical designs or observatories of the day, and were by far the most precise. The giant sundial produced even more accurate markings than those found on the astronomical tables by the great French mathematician Phillipe de la Hire, on which the designs were based.