Probably noob question but...

[Hazard]

but what is this used for?
http://i.imgur.com/XEpv4h9.png

[Game]

Haha, nothing at all actually! Just a minor mistake on my end

[Meep]

Not sure why that was also placed inside that spot, but those are also in Cthulhu's Lair. You stand next to it and cube a Cache of Ryleh and get a random dreamlands item.

If you need an explanation of any of these things, check out the wiki!