Sinus Iridum aka the “Bay of Rainbows” is a plain of basaltic lava in the Northwestern portion of Mare Imbrium on Earth’s moon.
It is surrounded by the rugged Mountain Range known as Montes Jura.
Sinus Iridum was formed from the remains of a large impact crater, which was then flooded with basaltic lava, inundating the “sea” wall.
The Bay of Rainbows spans 236km or 146.64 miles across.
If you were to drive across the Bay of Rainbows at 60mph, (assuming no crater sized potholes, LOL!!) it would take ~ 2 hours and 26 minutes.
Roughly the distance from Dayton, Ohio to Versailles, Kentucky, or Dayton, Ohio to Nashville, Indiana.
This bay and the surrounding mountains is considered one of the most beautiful features on the Moon, and is a favorite among lunar observers.
It is one of the features on the Moon that can be seen with the unaided eye.
C8 Telescope & ZWO ASI 224MC Color Camera, 600 frames stacked in Registax 6, at my backyard observatory in Dayton, OH.