The  Samseong-Bogung  of
Bulam-san's   East Cheonbo-sa
The Samseong-gak [Three Saints Shrine] of East Cheonbo-sa is another remarkable faux-
stone-cave, larger and all-enclosed.   Inside are three big granite carvings to symbolize and
venerate these three standard and popular folk-deities respected by Korean Buddhism.
An info-sign inside this shrine directs visitors
to chant-pray "
Nam-u-san-wang-dae-shin"
[I Take Refuge in Mountain-King-Great-Spirit]
to the San-shin icon, and similar "
Nam-u"
chants to the other two.  
That is a very common
and famous Buddhist phrase, used for "taking refuge
in"
Amita-bul [Amibitha Buddha of the Western
Paradise] or the holy triad of Buddha, Dharma &
Sangha.  This elevates the San-shin to the status of
a Buddha -- implied all over Korea these days, but
rarely made so explicit as this.  
This seems to be
a common tradition-theme around this
mountain, as reported on my pages on
Doam-sa and Bulam-sa.
inside, the altar-icons are carved directly onto an outcropping of the cliff.
L to R:  Dok-seong, a Yaksa / Jeseok-bul flanked by small white Chil-seong statues, and San-shin
the Mountain-spirit
This Samseong-gak is named in Chinese characters on its signboard (and in Hangeul on an
info-sign inside)
as the Samseong-Bogung [Three Saints Treasure-Palace], consistent with
the theme of this temple;
bogung is usually used for an enshrinement of holy relics of
Sakyamuni Buddha, and so the rare usage of it here elevates these folk-deities to the
religious-rank of Buddhas -- a nationwide phenomenon discussed in my book and often
tracked on this site.
The central Jeseok-bul carving, with strong Yaksa-yeorae [Medicine-bearing  / Healing Buddha]
motif, flanked by small white Chil-seong [Seven Stars of the Big Dipper statues.
Dok-seong, the Lonely Arhant, sometimes called "the Recluse"
This is the San-shin painting
formerly installed in the Shrine
of this temple, before the
"cavelike"
Samseong-Bogung
was built (my photo from about 1989).  
It features extremely ordinary
motifs, except that the
dongja
attendant is offering four Seondo
peaches-of-immortality (3 is typical)
and the top of his staff is similar to
crude
bullocho depictions.