Is American culture even a culture?

In the United States, we pride ourselves as an epcot of world culture and people's. It's a place where people come to make a new life without the sacrifice of their culture. However, there are so many heterogeneous cultures in America that it's hard to distinguish what exactly is American culture. Is American culture cow boys and western culture? Is it the southern barn house life? Is there even an American culture? Perhaps American culture is the making of all these cultures combined. American culture may be described through pop culture or what's running through the top of media. It's truly difficult to distinguish what American culture is because other cultures have defining factors that make the culture so unique. For example, Asian cultures are easily marked by their clothing, architecture, and food. Things like a colorful, long dress are very reminiscent of Asian culture. Even a simple bowl of pho is resembles parts of Asian culture. If we move over to America, however, there is nothing we can use to define American culture. What is American clothing? What is American architecture? What is American food? Which all these questions, it's easy to ask if there even is an American culture. What exactly is your stand point on this issue?