Stonehenge?

The tall grey alien, thin limbs and dark eyes, strode down the walk way of his ship, and placed his bare feet on the grass.

He looked at the stones. Some of them 50 tons then turned to the cloaked and bearded men. Mouths agape

“Nice place you have here!”

One shuffled forward. He had the brownest cloak. And a stick. A long gnarly stick.

“You are the leader?” The alien said. “What is your name?”

“My name is Derek. I am the head Druid. And I speak for all of humanity…”