What is holy is what touches our hearts, minds, and souls and reminds us of God's presence.  I think it is a sense developed as an individual absorbs a religious belief and what that belief teaches.  That sense is also developed in a culture/social environment) so how that culture incorporates ideas/ideals of God and goodness will also influence perceptions of what is holy.  We also each incorporate our own individual experiences of the sacred, profane and mundane,  moments of triumph and defeat, moments of love and sharing and beauty.  I found holy the small stone church built in the 1300's in a tiny village in the Cinque Terre. So was that moment canoeing on a lake in North Carolina, late afternoon, no one else on the lake, the only sound a slight swish of wind in the trees, the splash/gurgle of water when dipping the paddle in the water and pulling, gliding...  

Judson is holy to a lot of someones - or it is the place where they learn how to find holy space in meeting others needs.