Learn Hardcore Korean: gireul jalmos deureoseo da-eum sinhokkaji jikjinhaesseo. - I went the wrong way, so I kept going straight until the next signal.

Breakdown of gireul jalmos deureoseo da-eum sinhokkaji jikjinhaesseo.

Why is 길 marked with 을 here? I thought roads or places usually take location particles like 에 or 에서.

In this sentence, 길을 들다 is a common expression meaning to take a road/path.

So 길 is treated as the object of 들다, which is why it takes 을:

This is different from just saying you are on a road or at a place, where you would use particles like 에 or 에서.

So:

What exactly does 잘못 들어서 mean?

잘못 means wrongly / by mistake.

들어서 is from 들다, and here it means to enter/take a road or path. So:

The -어서 ending connects this part to the next action. In natural English, it often sounds like:

Is 들어서 from 들다 or from 들어가다?