Classification

Travels
19-10⟷55
The world, in general
19-101⟷135
The Asian continent
19-200⟷205
The Artic and Antartic poles
19-301⟷325
African continent
19-400⟷405
Oceania
19-501⟷535
The American continent
19-601⟷635
Near and Middle East
19-701⟷765
European continent