호수에

to the lake; in the lake

→ 호수
phrase Rare #26,357
to the lake; in the lake 호수 means “lake,” and 에 marks a destination or location. The exact translation depends on the verb.
KO: 주말에 호수에 가서 사진을 찍었어요.
EN: I went to the lake and took pictures on the weekend.

호수에 참치가 안 살지

Tuna don't live in lakes, do they?

— 빅 식 (2017)