From: http://wiki.openstreetmap.org/wiki/Overpass_API#Simple_usage_examples
around
allows you to get all nodes near one or more given nodes. For example, to get all nodes that are at most 10 meters around the nodes called Bristol:
<query type="node">
<has-kv k="name" v="Bristol"/>
</query>
<around radius="10"/>
<print/>
You can also chain queries to get only nodes satisfying a second criterion that are located near nodes matching the first criterion. Here, we will search for all bus stops within 100 meters of pubs named "Bristol":
<query type="node">
<has-kv k="amenity" v="pub"/>
<has-kv k="name" v="Bristol"/>
</query>
<query type="node">
<around radius="100"/>
<has-kv k="highway" v="bus_stop"/>
</query>
<print/>
https://github.com/datadesk/overpass-turbo-turorial
http://osmlab.github.io/learnoverpass//en/
Overpass Turbo documentation: https://wiki.openstreetmap.org/wiki/Overpass_turbo/Wizard