What is it like inside a dragon's belly?

Inside a dragon's belly would likely be a dark, warm, and damp environment, filled with the acrid smell of smoke and sulfur. The walls might be lined with tough, muscular tissue, pulsating with the dragon's powerful heartbeat. It could be a surreal, almost otherworldly space, where the remnants of digested meals create a bizarre landscape of bones and ash. Overall, it would be a claustrophobic and unsettling experience, far removed from the grandeur of a dragon's fiery exterior.