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.

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 ...

According to the Missouri Department of Conservation's website, the rock formation is "an erosional remnant left as a result of Mississippi River channel shifts."Composed of limestone, the rock ...

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.