Mahabharata 15.9.16

पुरं च ते सुगुप्तं स्याद्दृढप्राकारतोरणम्अट्टाट्टालकसंबाधं षट्पथं सर्वतोदिशम्

puraṃ ca te suguptaṃ syāddṛḍhaprākāratoraṇamaṭṭāṭṭālakasaṃbādhaṃ ṣaṭpathaṃ sarvatodiśam

Our plain-language meaning of this verse is waiting for scholar review.