"I got up there Friday afternoon probably around three and I got a tour of N.C. State's campus and then I went to their game that night," Allen told Scout.com.
"Saturday I was at Duke and I got a tour of their campus and watched them practice in the morning and a little bit of afternoon," he added. "Then Sunday I got up and got a quick tour of UNC and watched their game."
Allen said the fans at North Carolina State stood out to him. He even heard some of the students chanting his name.
"Probably the biggest thing that stood out was how crazy their students were," Allen said. "They had a bowl student section and they were standing up screaming the whole game. There were two or three behind me that kept chanting my name."
At Duke, it was the campus and their stadium that impressed the 6-foot-4, 175-pound guard.
"What stood out about Duke was the campus is beautiful," Allen said. "It has the old fashioned look. I got a chance to see Cameron Indoor, which I hadn't seen before. I didn't know it looked like that. It looked like just another building and you walk in and it's a gym. It was pretty cool to be in there."
On his final day in North Carolina, Allen stopped by to visit the Tar Heels. He said he spent majority of his time with UNC assistant Steve Robinson and was given a brief tour of campus before watching their Sunday night game.
"I didn't get to see the campus much since it was a game day and they were short of time," Allen said. "I did ride through it a little bit. That campus was really nice. It's not huge. It's all kind of there in a circle. All the buildings were nice. I like the basketball facilities. Everything is all in one place. It's all right there."
Allen said that North Carolina State is the only one of the three schools that has offered him a scholarship. He also holds offers from Florida, Florida State, Georgia, Purdue, Texas, Miami and others.