Climbing wall on the cruise ship Explorer of the Seas. The wall is 35 feet (about 10m) tall. The top is 220 feet (67m) above the ocean. (Source: Explorer of the Seas fact sheet.)
<a href="//commons.wikimedia.org/wiki/User:Mitch_Ames" title="User:Mitch Ames">Mitch Ames</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>