The place to propose depends on the personal preferences of the girl and the relationship between you.
1.Restaurant: If you like to dine in restaurants, you can book a table at a restaurant she likes and propose during dinner.
2.Nature: If you both like to spend time in nature, you can choose a beautiful place for a walk or picnic, and propose there.
3.At home: If you and your girlfriend live together or spend a lot of time together, you can propose at home. For example, you can prepare dinner and decorate the table with candles and then propose.
4.On vacation: If you're planning a vacation together, you can propose while on vacation. It could be on the beach, in the mountains, on a cruise ship, or anywhere else you choose.
5.At an event: If you're going to a concert, festival, or other event, you can propose there. For example, you can hire a musician to play a romantic tune and propose on stage.
Regardless of where you decide to propose, remember that the main thing is the expression of your feelings and love for the girl.