"哪个季节去台湾最好？"

Translation: What is the best season to go to Taiwan?

[michelle.ko]

A more natural translation would be to use which instead of what

[StephanusG1]

I knew I would get this wrong because there are so many ways to render it, such as:
Which/what season is (the) best to visit/go to/travel to/in/ / for visiting/going to/travelling to/in Taiwan. Et cetera.

[ThieumL]

去 does not imply anything like traveling, visiting... though

[Lodus2]

Any season besides Summer. (Okay, summer is okay too but it's pretty damn hot and there are typhoons!)

[deactivated user]

What IS the answer???

[StephanusG1]

我觉得秋天还是春天最好。

[mayateacher]

"What is the best season for going to Taiwan?" marked wrong. Reported Sept 30, 2019

[Martinolog]

春天

[m025678]

春夏秋冬

[norman.eis]

"What season is best" is proper English, and should be accepted as well