Research and explain the term specialised tourism, also you need to give examples:

Specialized tourism is an umbrella term for the kinds of tourism that are geared to special interests and that specialize in a certain topic or theme.

Explanation:

“Specialized tourism” refers to a kind of tourism that is carefully curated to the interests of an individual or small groups who want to coordinate their visits carefully and to see attractions or attend events that have a connection with their specific interests. It is an umbrella term for other kinds of tourism that are emerging that cater to more specific needs like special interest tourism, including gastro-tourism or even medical tourism. Volunteer tourism is another specialized tourism example where people go to participate in projects that help benefit the local people like irrigation projects or repairing a local school. This kind of tourism has emerged as more people are aiming to gain a rewarding experience from their travels and to do more and gain knowledge and worthwhile experiences while also in many cases giving back to the local communities.    

the density would be a smaller number.