Here’s a factoid that will blow your mind: the Burj Khalifa—the tallest building in the world—is so tall that you can watch the sunset from the base of the building, get into an elevator right to the top, and watch the sunset all over again.
In fact, if you are a muslim and live on top of the Burj Khalifa, you will have to fast longer for Ramadan because there’s a difference of about three minutes between sunset on the ground and sunset on the top.
You can experience this from every tall structure, however, provided that you have a fast-enough way to reach the top of it. You can even do it on a calm day at the beach with no help at all: first lie down looking at the horizon and then jump fast as soon as the sun completely disappears. You will be able to see the end of the sunset once again.
The taller the structure and the fastest you can get to the top, the longer you will be able to enjoy the second sunset. This happens because the Earth is curved and, by sticking out perpendicular to its curvature, you will be able to see more of what lies behind the horizon.