Stunning portal embedded in the ground or rock leading to an underground world filled with riches, crystals, and magical creatures, materials of stone, wood, or metals inlaid with gems and crystals, glowing runes or magical symbols surrounding the portal, roots, moss, flowers, and plants growing around the portal creating an ancient impression, textures of rock, stones, and earth covered with moss and vines, inside the underground world many crystals of various colors and sizes sparkling in the dim light, small underground lakes or rivers with crystal clear water reflecting the light of the crystals soft light emanating from the portal illuminating the path into the underground world, crystals glowing from within creating a magical illumination, ancient artifacts scattered on the ground like golden coins, ancient swords, and crowns, magical dust creating a mysterious and magical atmosphere,