Dragon Lair.

A vast underground dragon lair illuminated by rivers of molten lava flowing between jagged obsidian rocks. An enormous crimson dragon rests coiled atop a glittering mountain of gold coins, gemstones, and ancient crowns. Its scales shimmer with an inner fire, and thin tendrils of smoke curl from its nostrils. Massive stalactites hang from the cathedral-high ceiling, their tips glowing orange from the heat below. Scattered bones and rusted weapons hint at fallen adventurers who dared enter this forbidden domain.