Sunspot group 1247 is expanding rapidly and in an interesting way. The active region is organizing itself as a linear chain of sunspots, denoted by the rectangle in this July 10th image from the Solar Dynamics Observatory:

Sunspot Chain
© Space Weather
From end to end, the chain stretches more than 200,000 km, which makes it an easy target for backyard solar telescopes. Some observers prefer H-alpha telescopes tuned to the red glow of solar hydrogen, but for watching behemoth sunspots evolve, nothing beats a white light observing system. Monitoring is encouraged.

More Images:

From Cai-Uso Wohler of Bispingen, Germany; from David Evans of Coleshill, North Warwickshire, UK; from John Stetson of Falmouth, Maine; from Bob Yoesle of Goldendale, Washington