If you haven't discovered CGP Grey yet, his YouTube channel is a veritable fountain of geographic tidbits.
His distinctive style helps to contextualizes some of the more odd and complicated parts of Earth's borders. If you want another example, watch Bizarre Borders, part 1 which focuses on countries within countries and single-neighbor countries.
Aulde de Barbuat insight :
Excellent brainfriendly culturally interesting videos for Efl learners & others
Via Seth Dixon