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1) Athens 2) Thessaloniki 3) Patras 4) Heraklion 5) Larissa Not including suburbs of Athens and Thessaloniki
Depends on what region of Greece you are in. If you are in Athens, Thessaloniki, or some of the other more populated cities it becomes pretty dense. However rural Greece on the other hand is sparsely populated.
There are a lot: The Acropolis, Athens Delphi Palace of Knossos, Heraklion Temple of Poseidon, Sounion Roman Forum, Athens Lykavittos, Athens Kerameikos Archaeological Site, Athens Technopolis, Athens Microlimano, Piraeus The Agorá, Athens Plaka, Athens Espalanade, Corfu Mount Athos Temple of Poseidon, Sounion Meteora Monasteries, Kalambaka Rotonda, Thessaloniki Agia Sofia, Thessaloniki Monastery, Daphne Agios Nikolaos Orfanos, Thessaloniki Attica The White Tower Museum, Thessaloniki
Thessaloniki and Athens
1. Athens 2. Thessaloniki
1.Athens 2.Thessaloniki 3.Patra 4.Hrakleio 5.Larisa 6.Volos 7.Ioannina 8.Kavala 9.Chania 10Xalkida
Athens, Corinth, Thessaloniki, Larissa, Patras, Piraeus, Marousi...
Maximum 1 hour
Examples: Athens, Thessaloniki, Rodos, Piraeus, Chania, Herakleion, etc.
thessaloniki, athens, iraklion, larissa, kallithea
Athens, thessaloniki, Heraklion, Larissa, patra
Bucharest-Thessaloniki: 675 km