The phrase "where are they located?" can refer to various contexts depending on what "they" refers to. Based on the search results, here are some specific examples:
- If referring to volcanoes, they are mostly located along plate boundaries, especially around the Pacific Ring of Fire, which includes regions such as New Zealand, Southeast Asia (eastern portion), Northeast Asia (eastern portion), Russia, the western coast of North and South America (including Alaska to Mexico)
- More generally, "where are they located?" can be used to ask about the location of facilities, organizations, or places, and the answer depends on the specific subject. For example, employment centers, waste storage facilities, or hotels can be located in various countries or cities as per their context
If you specify what "they" refers to, I can provide a more precise location.