Summer's Gravestone

The Cliffside Altar (unofficial) is located at the cliffs of the Snowy Forest. It is seen during the beginning of the "Red" Trailer, with Ruby Rose standing in front of it. It also appears in the Volume 1 Opening.

Description
Inscribed on the altar (or possibly gravestone, due to the lyrics of Ruby's theme) is a rose along with the words "Summer Rose / Thus Kindly I Scatter," which is an allusion to the poem The Last Rose of Summer by Thomas Moore.

The altar/gravestone belongs to Ruby's mother, Summer Rose.

The cliff can be seen in the Volume 1 Opening, with Ruby kneeling before the altar/gravestone, and a ghostly figure hovering above the altar, wearing the same white hood and cape that was worn by Summer, although in this appearance, the cape is red inside.

Location
Not much is known about the actual location, except that it exists in the Snowy Forest on the edge of a sheer cliff.

The location itself, however, is surrounded by a thick forest, where a large number of Beowolves reside.