He leaves no stone unclimbed.

A Brooklyn man is suing the city after falling from a large boulder in a Hudson River Park that he says was just begging to be climbed.

“Just because I’m an adult doesn’t mean I don’t get to explore the world, too,” said Jonathan Stock, 32, who ruptured his Achilles tendon in the fall.

The personal trainer was hanging out with friends in a lower Manhattan stretch of the park in June when they spotted an artistic arrangement of rocks of various shapes and sizes at the water’s edge.

Most of the rocks are flat, and range from a couple of inches to a few feet tall. But the centerpiece is a 10-foot-tall, rectangular boulder with a slight slope on one side.

“I ran and jumped it, and I pretty much knew exactly what happened right away. I tried to stand up and fell back down on my face completely,” he said.

Stock needed surgery to repair his right Achilles. At the time, he lived in a third-floor Manhattan walkup and says he was trapped inside for weeks due to the injury.

Now suing the city and the Hudson River Park Trust in Manhattan Supreme Court for unspecified damages, Stock claims the tall rock “created a dangerous condition.”

The rocks, titled “Stonefield,” are “arranged to show their unique characteristics and individual ‘being-ness,’ ” according to hudsonriverpark.org. The city and the Hudson River Park Trust declined comment on the lawsuit.

Stock’s lawyer says the absence of a sign barring climbing is negligence. “It just invites you or anybody with any athletic sense to give it a try,” said attorney Andrew Spinnell.