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| Nation | State | City |
| Greece | Attica | Cape Sounion |
| Greece | Peloponnese | Gytheio |
| Greece | Peloponnese | Olympia |
| Korea | Busan | Busan |
| Korea | Seoul | Seoul |
| Greece | Peloponnese | Kalamata |
| Greece | Central Greece | Chalkida |
| Greece | Attica | Eleusis |
| Greece | Thessaly | Larissa |
| Greece | West Greece | Patra |
| Greece | Peloponnese | Corinth |
| Greece | Attica | Marathon |
| Greece | Central Macedonia | Thessaloniki |
| Greece | Peloponnese | Sparta |
| Greece | Attica | Athens |
| Croatia | Czech | Denmark |
| Finland | Greece | Iceland |
| Ireland | Japan | Korea |
| Liechtenstein | Netherlands | New Zealand |
| Norway | Peru | Spain |
| Sweden | Swiss | USA |
| Mr. Jin's Math Classroom | Teacher Jin's Library |
| PaperLee's Hobby Life | Flo's Norway |
| Zoochess |