- Struve Geodetic Arc (transnational site with Albania, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, France, Germany, North Macedonia, Spain, Poland, Romania, Slovakia, Slovenia, Switzerland & Ukraine)
Philately - UNESCO World Heritage on stamps / Philatélie - Patrimoine Mondial de l'UNESCO et timbres / Filatelie - Patrimonio Mundial UNESCO y sellos / Philatelie - UNESCO Welterbe und Briefmarken
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