A rock formation in the Mississippi River normally only reachable by boat is accessible by foot for the second year in a row as water levels plummet. Tower Rock juts out of the Mississippi River ...

A drought has exposed Tower Rock, a Mississippi River rock formation. Here's what it looks like The site is normally only accessible by boat. But, tourists hoping to visit might be disappointed.

Tower Rock becomes walkable when water levels drop below 1.5 feet at a nearby river gauge. - Veronica Merrell CNN’s Rachel Ramirez and Brandon Miller contributed to this report.