Extreme adventurers, there's a new heart-stopping experience to be had.

On June 1, the CN Tower in Toronto will begin selling tickets to EdgeWalk, a newly constructed 5-foot ledge that encircles the top of the 116-story tower. For $175 a person, groups of six to eight people at a time will be encouraged to walk along the ledge, their limbs unencumbered, with the help of specially trained CN Tower guides. They can even lean 4 inches over the edge, Jack Robinson, the CN Tower's COO, told CNN.com. Walks will begin August 1.

"It will be a thrilling experience!" he said, adding that EdgeWalk has been three years in the planning with an entire year devoted to safety measures.

"We have passed every single and solitary health and safety test out there," Robinson said.

Here's how it will work:

Participants will have to take a breathalyzer test and be checked for anything out of the ordinary. If you're acting abnormally, or the staff suspects you're a loose cannon, you'll be turned away regardless of whether you've paid. If you pass those tests, you'll be fitted for a special harness and shoes.  Items like eyeglasses will be tethered to your person. All walkers must meet height and weight requirements.

The harness is connected to an overhead safety rail which is connected to a trolley system. Specially trained guides will encourage groups to "push their personal limits, allowing those who dare to lean back over Toronto, with nothing but air beneath them," according to a CN press release.

The walk itself will last about 30 minutes. From start to finish, the experience will last an hour and a half.

Adrenaline junkies who dare to try EdgeWalk will be rewarded with incredible views of Lake Ontario.