It's Epcot Center by a mile, with a caveat. It's the Epcot of 1994.
(Map is from 1989, but you get the idea.)
World of Motion was still in operation, Wonders of Life still existed, Universe of Energy, The Living Seas and Journey Into Imagination were still on their superior original incarnations, and most importantly Horizons was still in existence and still glorious.
Communicore and Innoventions is about a 50/50 split for me, but I tend to lean towards Innoventions simply because of the glorious Sega setup they had. Console demos and arcade machines as far as the eye can see.
Epcot started it's downward spiral when 1998 when Journey Into Imagination shuttered and the blandest, most downright offensive replacement took its place: "Imagination!" featuring Eric Idle, which a variant of operates still to this day.
A year prior we lost World of Motion, one of the late great Ward Kimball's best works. Test Track in its original incarnation was okay at best, but the current "neon" overhaul is just awful.
Horizons then shuttered in 1999. A sad, sad day. The ride was, of course, dated as hell but it was emblematic of the park's original purpose...the melding of science, technology, optimism and the enduring human spirit to expand our knowledge and bring the human race into new frontiers. Now it's a space simulator...hooray.
The Living Seas got a Nemo makeover in 2006, a foreboding omen of the IP creep that is slowly infecting both Future World and World Showcase at Epcot Center. The hyrdolators and Seabase Alpha were both stunning in their execution, and sorely missed.
Wonders of Life went seasonal for a long time and slowly started to decay. Body Wars was shuttered, live shows cancelled, and the interactive attractions slowly falling into disrepair. These days it's a sad reminder of a once-great pavilion.
Universe of Energy's original presentation, while admittedly dry, had some great moments. The opening radok panels presentation was a sight to behold and the theater-filling laser show in the outro was amazing as well. Ellen's Energy Adventure wasn't awful, but it also wasn't a patch on the original.
Then the final nail in the coffin fell into place in 2014. Maelstrom was replaced by Frozen garbage, and it was at that point that Epcot is all but dead to me. The park is slowly introducing more and more Disney branding (Guardians of the Galaxy? FUCKING REALLY?) to the point where it's not the same park anymore, and it's really sad.
It's practically a dead mall at this point. Lots of space but lots of empty space and slowly deteriorating attractions. It's a massive bummer.
But hey at least World Showcase, Maelstrom loss aside, has more or less survived the ravages of Eisner and Iger, that's a positive.
And I proposed to my wife during Illuminations in Japan on our 10th anniversary, so that was special.
But it's just a sad state of affairs overall.
Had a big rant on DisBoards about it back in 2013, and it's only gotten worse in the intervening five years.