how can i go between scenes like in ocarina of time?

Hey currently in creating a game that's pretty similar to the first Zelda on nes. I do however want to make it modern so I've worked some of ocorina of times mechanics into the the game so I was wondering how do I make it so you can go into a scene from a dungeon entrance then go back out on the other side of the entance without restarting from the beginning part of the scene where the game starts. I realy hope you guys get what I mean this is the best I could explain it