Cape Sounion (Temple of Poseidon)
Marble temple on Aegean cliffs — go for sunset
Athens's day trips include Delphi, Cape Sounion, the Saronic islands, and nearby ancient sites.
Marble temple on Aegean cliffs — go for sunset
Oracle ruins on Mt. Parnassus — long but iconic
Closest Saronic island — pistachios, Temple of Aphaia, beaches
Car-free island with stone houses — donkeys + walkers only
Venetian fortress town + ancient Mycenaean ruins + lion gate
Long but doable — monasteries on top of vertical rock pillars