Walking Mausoleums look like giant stone "turtles" moving on giant stone legs. In order for the mausoleum to become accessible, you must destroy enough white/gray skull-like deposits located on the legs or along the mausoleum's main platform. To get to the latter, you must find a way to jump onto the mausoleum.
Once you get inside the mausoleum, you will be able to use the option of duplicating one of remembrances you've previously acquired. Duplication can only be performed once per mausoleum.
