underground tunnel dug into the rock with artificial lighting along the ceiling and gentle curves towards the unknown in tassullo.

wall infrastructure tunnel arch formation temple ruins cave rock floor geology building alley wadi wood fortification architecture monastery terrain descriptive title 120 characters underground dug artificial lighting along ceiling gentle curves towards unknown description 300 linear rough walls curved wide passage built transit technical purposes goes darkness creating mysterious suggestive atmosphere tags dark excavation environment interior structure mining construction technology safety industrial engineering path mystery quarries road design secrecy cavity rocky natural materials enclosed spaces security italia located tassullo trentino