This is possible because our planet isn't actually a sphere, as most people think, but actually, an oval inflated in the middle. In Ecuador, Mount Chimborazo may only be 20,564 feet in height, but because the equator pushes it up, it is closer to the moon than Everest by 1.5 miles.
Istanbul is a major city and the only one that is located in both Europe and Asia, with the Bosphorus Strait running right through the middle. A bridge connects the two parts of the city, with the European half being the most populous and serving as the city's historical center.