I think both options are interesting. First catch the tourists at home informing that they can plan some monuments on their foreseeable holidays, and then catch the people geolocated with the monuments they have on place.
Vicenç
From: lodewijk@effeietsanders.org
Date: Wed, 11 May 2011 10:35:18 +0200
To: wikilovesmonuments@lists.wikimedia.org
Subject: Re: [Wiki Loves Monuments] Geolocated centralnotice
I think such use would be very helpful - I personally was definitely planning on that yes. It makes little sense to bother everybody in other countries with announcements they cannot use.
Another option is to do everything language based, which has as advantage that you also "catch" the tourists, but then you dont get all the people at enwiki for example.
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