Central Park's lampposts can be used to navigate the park

Central Park, located in the heart of New York, the largest city in the entire United States of America, contains over 1600 cast-iron lampposts scattered throughout it. Each of these lamp posts have a four-digit code located near the bottom of them, which may look like complete gibberish to those who do not know what the four digits mean. However, these codes can actually be used to find your way through Central Park. The first two numbers represent the nearest street number, while the latter two digits indicate whether you are on the East or West side of the park, with East being even and West being odd numbers.