Matsya Purana — The Cave-Sanctuary: Jewel-Lake
समन्तात्सरसस्तस्य शैललग्ना तु वेदिका सौवर्णै राजतैर्वृक्षैर् विद्रुमैरुपशोभितम् //
samantātsarasastasya śailalagnā tu vedikā sauvarṇai rājatairvṛkṣair vidrumairupaśobhitam //
All around that lake there was a platform (vedikā) set against the hillside, beautifully adorned with golden and silver trees and with coral embellishments.
This verse is not about pralaya; it is a Vastu-style description of an auspicious sacred setting—how a holy lake precinct is ornamented and spatially arranged.
It supports the ideal of dharmic patronage: rulers and wealthy householders are encouraged (elsewhere in the Purana) to build and embellish sacred precincts—lakes, platforms, and ritual spaces—as acts of merit (puṇya) and public benefit.
The key feature is the vedikā—an elevated platform/terrace near a sacred lake, anchored to a hillside—indicating deliberate site-planning (siting, stability, and auspicious beautification) consistent with Puranic Vastu and tirtha design.