Summer's Gravestone

The Cliffside Altar (unofficial) is a location at the cliffs of the Snowy Forest, where Ruby is seen standing at the beginning of the "Red" Trailer, as well as the 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.

It is unknown as of yet, but the Cliffside Altar appears to have some ties to Ruby. The altar is possibly a monument from her past or the gravestone of a family member, friend, or lover.

The Cliff can be seen in the opening sequence, with Ruby kneeling before the altar/gravestone and a ghostly figure hovering above the altar wearing a white hood and cape which is red inside.

It is speculated that this Altar is dedicated to a family member (deceased) as it shares the same symbol as Ruby's. Ruby also seems to be mourning at the Altar. She is also seen to be looking at the figure above the Altar, which could be said relatives spirit that she has seeked out for guidence. This theory is also supported by the fact that Red Like Roses Part 2 is the second part to Red Like Roses, the song playing through the "Red" trailer, and Jeff Williams likes to relate the lyrics to plot points. The lyrics in part 2 mention missing someone, Inferring that someone that she was close to has either gone away or has died.

Location
Not much is known about the actual location except that it exist in the Snowy Forest on the edge of a cliff. The location is however surrounded by a thick forest, where a large number of Beowolves reside.