Dinosaur fossils have been found in the Denver, Colorado, metropolitan area that were exposed during recent construction projects. This urban area lies on top of a treasure trove of fossils, both dinosaur and others. Evidence suggests that millions of years ago this area was part of a tropical rain forest. During excavation for Denver International Airport in 1989, bone and plant fossils were found. There are other examples, too. Recently, the remains of four Triceratops were discovered during the construction of fairways at The Heritage at Westmoor Golf Course; and at a subdivision south of the golf course bones from five dinosaurs, a crocodile, and a mammal were found.