From the ancient Maya ruins of Chicanná, here’s the House of the Serpent Mouth (a.k.a. Structure II):
As you can see with a bit of squinting, this structure gets its nickname from the fact that the front of the building is modeled after a monster mouth (teeth both above and in front of the door, stylized eyes, etc.).
The site was discovered and named (Chicanná means “serpent-mouth house” in Mayan) by Jack D. Eaton in 1966. So… this structure was named after its Chenes-style monster mouth doorway, and the site was named after the structure. It’s a great little site to explore — not very big, but also not crowded.