Greece, I suppose. It was my longest trip anyways, it's the "maturalac" - long(ish) high school trip we take usually between 3rd and 4th grade. Went there by crusier from Venice, loaded our bus on it and drove all over the country...
Metsovo is neat, Meteora is the most bizarre place I've been to (or it shares first spot with Plitvice Lakes), though climbing up there with a hangover was... an experience (but whomever put a roof-pool on our hotel is genius!), we play-acted as professional athletes in the old tracks in Delphi, there's something very elegant and eerie about Parthenon which I can't describe... pictures don't do it justice, you have to go there in person. I mean it's just a ruin, it shouldn't be so beautiful, right? But it is. Mycenae is visibly old AF, and it was cool to visit the tomb of "that dude from Iliad", Epidaurus theatre is the 2nd (3rd) most bizarre place I visited - a couple of our singers went to the bottom, sang with normal voices, we heard them perfectly at the top of these stairs (Ancient Greeks could into math, obviously).
My hotel (hour away from Athens) was 30m from the sandy beach, of course we skinny-dipped at night because YOLO. Also played guitar at the beach/promenade. I jumped into the hotel pool at night, even though it's forbidden, saw a shooting star, felt at perfect harmony with the world, the harmony that comes from being warmly drunk and lying on your back in some body of water at night. I gained 3 kilos during that 10-day trip, Greek food is awesome. (I was kinda sick of gyros by the end tho.) Failed to learn how to dance Sirtaki, though the belly-dancer made up for it. The vendors - and what I observed of Greeks in general - remind me of the mentality our Dalmatian folks have, simultaneously easygoing and too-excitable/chatty (idk how they multitask like that).
On the way back, I thought it was a bright idea to playact Titanic "I'm the king of the world!!", my BFF pulled me off the railings. Probably saved my life, which is one of the many reasons she's my BFF.
Oh, and in the bus our Latin&Greek teacher had a so-called radio show, where he'd alternately sing mocking songs for whomever got the most wasted last night, and give us educational tidbits. Like... [we're passing by some ruin XYZ] => "aaaand to the left of you, you can observe how peasants and barbarians ruined everything that use to be pretty!"
TL;DR: seriously unless you're a sun or warm-sea deficient Euro, don't go to Greece only for the sake of the beaches. There's so much to see inland, and Meteora at least is more worth it than Athens - not to say the Acropolis is uncool, but. METEORA. (Try to find the skull-room.) Beware of Greek food, it's dangerously tasty and fattening.
