If the box office is any indication, "Jurassic World" is kind of a big deal.

Several factors contributed to its crazy record-breaking opening weekend, and high on that list is nostalgia for the original "Jurassic Park." (SPOILER!) In fact, "World" contains several locations and scenes that call back to iconic moments from the first film. In honor of "JW," here are 21 references the blockbuster makes to Spielberg's first trip to Crazy Dinosaur Island.