What is unique about Zermatt?

Doing research about Zermatt, a small village in canton Valais in the Southern part of Switzerland, I was impressed not least about the extraordinary nature in the area: There are 29 mountain peaks over 4,000 meters, about 50 lakes and almost 100 natural Springs. Just a few thousand people live in Zermatt, but more than 2 million people from all over the world visit Zermatt each year.