Watch Adam Ondra make a great attempt on The Black Diamond Projects “World’s hardest indoor route” at Klättercentret in Telefonpla, Sweden on the 23rd April 2017. Estimated to be harder than a 9b+, Adam made an unbelievable climb.

This permanent climbing route and is open for everyone to climb – there’s also prize money involved including the first person to send the route – good luck!