We had a picnic in the park.

This park has a man-made lake.

We went for a picnic to the lake on the weekend.

We had a picnic at the lake over the weekend.

We had a picnic in the forest park over the weekend.

We are planning to go to the national park this weekend.

The parkway is one of the best places to enjoy the beauty of nature.

We are planning to go to the national park this weekend.

He is interested in the study of constructed languages.

This park was completely artificially made.