What are some countries or places you either completely forget even exists or didn't even know existed?

Inspired by this question here.

I'm pretty good at world geography, though not perfect at it by a long shot. I know most of the world's countries without being a geography expert or into it, but some places I either forget existed or had no idea were even real places.

FORGOT:
Andorra
Angola
Azerbaijan
Brunei
Djibouti
Equatorial Guinea
Eritrea
Gambia
Liechtenstein
Micronesia
Oman
Saint Kitts and Nevis
Saint Lucia
Saint Vincent and the Grenadines
Seychelles
Suriname
Togo
Tonga

JUST LEARNED ABOUT:
Antigua and Barbuda
Bahrain
Benin
Bhutan
Burundi
Côte d'Ivoire
Cabo Verde
Comoros
Eswatini
Grenada
Guinea-Bissau (not Guinea)
Holy See
Kiribati
Kyrgyzstan
Lesotho
Malawi
Marshall Islands
Mauritania
Mauritius
Nauru
North Macedonia
San Marino
Sao Tome and Principe
Solomon Islands
Tajikistan
Tuvalu
Vanuatu

What are some places you either forget easily or didn't know existed?
What are some countries or places you either completely forget even exists or didn't even know existed?
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