Mayan Ruins: Medusa
They enter the large ruins and inside they see rows and rows of human statuse and finally, a large monument, the temple.
Hall of Darkness: https://www.youtube.com/shorts/VB3pbNh7Mw8
Volcano: Fire Elemental
(A seemingly normal looking city built upon a dormant volcano is home to a peaceful people. Every once in a while, this town turns into a scene of a horror movie. Every citizen will suddenly wear a gas mask and urge you to do the same, for your own safety, as dangerous gasses from the volcano below fill the entire town.) Once a year, a select individual is chosen to travel into the volcano and worship the fire god
Water Elemental
Pyramid Temple in the Desert
Boss: Yuan-Ti Abomination (pg. 308) Challenge: 7 or Lamia (pg. 201) Challenge: 4 or Gynosphinx (pg. 282) Challenge: 11
Crystal Cave
Ghost Town
Boss: Shield Guardian (pg. 271) Ch lvl: 7
Magic City
Boss: Hydra with different magical heads.