に行くつもりなの

intend to go to

→ に
phrase Uncommon #11,431
intend to go to つもり expresses an intention or plan. The ending なの gives the phrase a casual, explanatory tone and can appear in questions.
JA: 週末、海に行くつもりなの。
EN: I'm planning to go to the beach this weekend.

あの映画、見に行くつもりなの?

Are you planning to go see that movie?

バスでボストンに行くつもりなの?

Are you planning to go to Boston by bus?

本当に明日ボストンに行くつもりなの?

Are you really planning to go to Boston tomorrow?

どこに行くつもりなの?

Where are you planning to go?

トムは本当に独りでボストンに行くつもりなの?

Is Tom really planning to go to Boston by himself?

あそこに行くつもりなの?

Are you planning to go there?

そのお店に行くつもりなの?

Are you planning to go to that store?

トムと一緒に行くつもりなの?

Are you planning to go with Tom?

外国に行くつもりなの?

Are you planning to go abroad?

実は、ニュージーランドに勉強しに行くつもりなの。

Actually, I’m planning to go to New Zealand to study.

今年の夏はね、私たち海外旅行に行くつもりなの。

This summer, we're planning to travel abroad.