This is the 946th most frequent Greek word.
επισκεφθεί
"Επισκεφθεί" means "to visit."
Here, 'επισκεφθείς' is used in a subjunctive form to suggest an action (visiting the museum).
Πρέπει να επισκεφθείς το μουσείο, είναι καταπληκτικό.
You should visit the museum; it's amazing.
'Επισκεφθεί' is used here in the past perfective form to describe a completed action of visiting the old school.
Εγώ μόλις επισκεφθεί το παλιό μου σχολείο και θυμήθηκα πολλά.
I just visited my old school and remembered many things.
In this sentence, 'επισκεφθεί' is used in a future subjunctive context to indicate the action of visiting Athens, which is contingent on the occurrence of the future visit.