Leonardo DiCaprio, Vittoria Serretti Go for a Romantic Bike Ride in New York City

Leonardo DiCaprio And Vittoria Seretti Sticking with popular European transportation Stateside … biking through the Big Apple and hanging with a member of Leo's family.

The actor and his model girlfriend hit the streets of New York City on Saturday … the two flying down the street on bicycles — Leo in his usual camouflage mask and hat combo.

Check out the pics … while he's trying not to draw too much attention, he needs his nose to breathe during physical activity — and, apparently, he wears a mask.

Vittoria is also keeping a low profile… thick black sunglasses and a hoodie pulled up, covering her hair. In one picture, Leo's niece Normandie Farrar Seen riding with his unc and his GF, so they weren't completely alone.

Of course, LD and VC are back in the States after enjoying a rip-roaring European vacation. Both were in Italy earlier this month… Snuggling up together In and after Rome Going out to dinner With Vittoria's parents.

Leo got a red wine for the table that cost over $27k…albeit from your clintelli Jeff Bezos And Lauren Sanchez from Katy Perry And Orlando BloomGood stuff to stock up on.

The two have spent extensive time together and with each other's families, with Normandy the most recent member of DiCaprio's family to meet Vittoria … so, this is definitely the real deal.