At the top of the mountain is a signpost to tell you you've reached the summit. Literally every mountain that humans have reached the top of has one of these summit signs.
At the summit, you decide to build your new home (ほう). It's been destroyed so many times, and you're sick of it. Maybe if you build you home at the summit of this mountain it will be safer.
Currently there are no similar looking kanji which exist in the WaniKani learning system