|The Pyramid of the Sun is situated on the Teotihuacan archeological site in Mexico. This massive structure is the third largest pyramid in the world after the Great Pyramid of Cholula and the Great Pyramid of Giza. It was originally built around the first century in the Teotihuacan city, which had a population of about 100,000 - 150,000 and was one of the largest cities in the world.
The pyramid originally stood at a height of 246 feet (75 meters), it has now been reduced to 233.5 feet / 71.2 meters. In the 1970s, a tunnel was accidentally discovered deep inside the pyramid. The tunnel leads to what might be called a cave which is a the center of the structure, it consists of four chambers and is shaped like a four-leafed clover. The cave was originally thought to have been naturally formed, it is now understood to have been man-made. It is not open to the public. The Pyramid of the Sun is one of the most popular tourist attractions in the region and is certainly worth a visit. There is a 248-step climb to the top which offers breathtaking views of the surroundings.