Justin Timberlake performs "Mirrors" at the first show of the Forget Tomorrow World Tour. (Source: @efduarte / LIFESTYLOGY /TMX) ...

Lintel 25 is one of a handful of mirror-image inscriptions that were designed as interactive experiences, where ancient visitors could figuratively travel to the land beyond the looking glass.

Once complete, the M1 will hold 798 individual hexagonal pieces. It’s considered to be the world’s largest mirror ever built for an optical telescope at a whopping 39.3 meters in diameter.

There, within a yet-to-be-built, 22-story enclosure, the seven primary mirrors will be united in a flowerlike formation, Januzzi explains. “We’ve got six petals, and one in the middle.” ...

Justin Timberlake performs "Mirrors" at the first show of the Forget Tomorrow World Tour. (Source: @efduarte / LIFESTYLOGY /TMX) ...