ENGLAND - Alnwick Castle

GB-46156, by toucans

NETHERLANDS - Utrecht

NL-97952, by momo240

POLAND - Lake Solina

Private swap, by Kazimierz

CROATIA - Pula / The Arena

Panoramic card RR, by rlicul

HUNGARY - Budapest / Chain Bridge and Buda Castle

Panoramic card RR, by manda10

BULGARIA

Private swap, by fca777

DENMARK - Copenhagen / Amalienborg

Panoramic card RR, by Gforp

GERMANY - Düsseldorf

Panoramic card RR, by Murmel-007

BULGARIA - Towers of Bulgaria

Private swap, by fca777

SERBIA - Belgrade / The Church of St. Paraskeve

RS-1863, by nel-tu

BELGIUM - Antwerp City Hall at the Grote Markt (Main Square).

Belgium x Other Countries RR, by kovske

BULGARIA - Sofia / Narodno Sabranie Square and Vitosha Mountain

Private swap, by fca777