Get all Locations from EBID
https://st2.newmexicowaterdata.org/FROST-Server/v1.1/Locations?$filter=properties/agency eq 'EBID'

Get all Locations and Things from EBID
https://st2.newmexicowaterdata.org/FROST-Server/v1.1/Locations?$filter=properties/agency eq 'EBID'&$expand=Things

Get all Locations and Things with a Location name that startswith 'AR-'
https://st2.newmexicowaterdata.org/FROST-Server/v1.1/Locations?$filter=startswith(name,'AR-')&$expand=Things

Get all Locations and Things within a given bounding box defined by latitudes and longitudes
https://st2.newmexicowaterdata.org/FROST-Server/v1.1/Locations?$filter=st_within(location, geography'POLYGON((-106.9466 34.1201,-106.8038 34.1201,-106.8038 34.0086,-106.9466 34.0086,-106.9466 34.1201))')&$expand=Things

For more query option examples see ST docs