(ABC) -- A picture-loving woman thought her boyfriend was taking another Instagram-worthy snap when she later realized he was actually proposing.

Kayleigh Fahey and James Regatuso had just returned from a trip to Bali and Indonesia. The bride-to-be admitted to ABC News that she had thought Ragatuso, 30, would pop the question there.

"But I thought it'd be cheesy to do it overseas," he said.

Instead, he picked a park that they had frequented many times throughout their relationship -- Letchworth State Park in Castile, New York.

"It's just in our home town so we have a lot of history there," Ragatuso explained.

James Regatuso and Kayleigh Fahey got engaged on Nov. 12, 2017 inside Letchworth State Park in Castile, N.Y.

The two high school sweethearts reunited back in 2004 after splitting up. In fact, it was after Ragatuso was diagnosed with a heart condition that he decided to reach back out to his high school girlfriend, who had made a career as a nurse practitioner in cardiology.

James Regatuso and Kayleigh Fahey got engaged on Nov. 12, 2017 inside Letchworth State Park in Castile, N.Y.

Ragatuso admitted that he didn't know exactly where in the park he wanted to get down on one knee last Sunday.

"But when I looked up, I saw we had a good backdrop. I told her that we were going to take some pictures," he detailed. But instead, Ragatuso started a video to capture the heartwarming moment.

"I was absolutely shocked when I turned around and he was down on one knee," Fahey, 31, said. "Never did I think it would end up being the most meaningful moment of our lives."

A video of that moment has gone viral on Instagram, with more than 32,000 views.