How are people's interests related? By exploring people's interests from LinkedIn profiles, we have created an interest graph to understand these relationships. The graph nodes are interests (hiking, painting, design), color-coded by category. Links between nodes appear when interests co-occur in multiple profiles. By looking at the graph, we can see which interests are more commonly shared among people, and whether these interests are in the same category (that is, similar to each other). This allows us to form hypotheses about how and why certain interests co-occur more often than others, and measure the diversity of a person's interests.