Mid-Passage Block

This central block accommodates a four-inch volcanic rock passage, providing the habitat's most spacious interior corridor. The increased diameter offers enhanced movement freedom for species requiring greater clearance while maintaining the coarse textures that promote healthy nail wear. Interior surfaces present expanded opportunities for physical engagement, with irregular contours challenging climbing instincts and supporting behavioral enrichment. The exterior showcases prominent citadel features—defensive structures, ceremonial spaces, or administrative chambers that formed the fortress heart. The advanced thermal barrier system proves critical in this larger chamber, with the insulating foam core preventing heat penetration and maintaining an exceptionally stable cool environment despite the increased interior volume.