Zac Efron is back on American soil after being hospitalized in Spain … following an incident in a swimming pool … and TMZ has the first images of the actor arriving in the States.

As you can see, Zac is rolling deep … he’s got a whole entourage with him on the tarmac at a Miami airport after taking a private flight home from Ibiza.

Looks like Zac is bringing home some souvenirs from his summer vacation in Europe … peep his hat — seems he picked up this lid in Mykonos, Greece.

Zac’s mostly covered up in a hoodie, cap, and face covering … but he’s showing no lingering signs of his swimming pool mishap in Ibiza … ya know, the one that required a hospital visit.

TMZ broke the story … Zac’s camp says he dove into a swimming pool, hit the bottom with his chest and ingested a large amount of water. He showed signs of distress … was momentarily dazed … and onsite security at his Ibiza villa pulled him out of the water.

Zac was taken to a hospital as a precautionary measure, but he was back working out the next day … and we’ve been told he went out to dinner Sunday night in Ibiza — before hopping on a flight home Monday. It looks like he’s traveling with at least one man who was with him in Ibiza.