When asked to name some of the most iconic buildings in all of human history, very few recent structures come to mind. Instead, we think of structures like the Pyramids of Giza, the Parthenon, and the Colosseum. This makes you think, where will modern high-rise buildings like the Empire State Building or the Burj Khalifa be in, let's say, 500 years? Will these now iconic buildings remain standing or be forever forgotten?