Here's a sreenshot. The ladder im talking about is a top left corner. This is near "Luculla Mines" Crypts.
http://i.imgur.com/H2082uy.pngThere also is an option for the last mirror in the same mines to teleport to a "gold within" room, which is inaccessible.
Second chest - as in one of the four chests required to open "the last chest" at the Homestead. I've found 3 of them but seems to have missed this one.