Вы можете получить темы для данной области ([0,0,50,50] в моем примере): http://api.freebase.com/api/service/geosearch?location=[0,0,50,50]&location_type=/location/location&inside=true&indent=1&format=ids
И затем получить события, которые там произошли:
[{
"id": null,
"locations": [{
"id|=": [
"/en/algeria",
"/en/austria",
"/en/austria",
"/en/andorra",
"/en/andorra",
"/en/asia",
"/en/albania",
"/en/albania",
"/en/armenia",
"/en/armenia",
"/en/azerbaijan",
"/en/azerbaijan",
"/en/ankara",
"/en/aegean_sea",
"/en/anatolia",
"/en/athens",
"/en/abensberg",
"/en/casa_batllo",
"/en/park_guell",
"/en/casa_mila"
]
}],
"name": null,
"type": "/time/event"
}]