Rome mist

"We're setting down in that park," Leo announced, pointing to a wide green space dotted with palm trees. "Let's hope the Mist makes us look like a large pigeon or something."
Percy wished Jason's sister Thalia were here. She'd always had a way of bending the Mist to make people see what she wanted. Percy had never been very good at that. He just kept thinking: Don't look at me, and hoped the Romans below would fail to notice the giant bronze trireme descending on their city in the middle of morning rush hour.
It seemed to work. Percy didn't notice any cars veering off the road or Romans pointing to the sky and screaming, "Aliens!" The Argo II set down in the grassy field and the oars retracted.


 MoA pg.326