A massive rounded stone archway is ...

A massive rounded stone archway is built into the base of a mountain cliff. The entrance is tall, imposing, and deeply recessed, leading into a dark hollow interior. The arch has a broad curved top and is supported by thick vertical stone pillars on both sides. The structure feels like an ancient monumental gateway, carved directly into the landscape. The opening is large enough to feel like the entrance to a hidden temple, fortress, or sacred chamber