The Trevi Fountain's central figure is of Neptune, god of the sea, riding a chariot in the shape of a shell pulled by two sea horses, each guided by a Triton. It's a popular tourist destination so there are usually crowds. A good time to see it is early morning or in the evening with the lights on. The fountain has been featured in many movies that take place in Rome. Although they often depict a character jumping into the fountain, it is illegal to do so. You can, however, through coins into the fountain, said to ensure your return to the eternal city.