While orbiting over the South China Sea, an astronaut aboard the International Space Station took this oblique photograph of the blocky red and gray urban pattern of Manila and surrounding cities. Manila is sandwiched between the salt water of Manila Bay (bottom left) and Laguna de Bay (upper right). The great docks at the port can be seen jutting into Manila Bay, while the heart of the city lies immediately inland of the port. A forested nature reserve with a lake is located within one of the mountainous areas surrounding the metro zone (top left). The combined population of Manila and neighboring Quezon City is 4.7 million people. Manila itself has one of the highest population densities in the world, with 42,857 people per square kilometer.