The park near the sea isn’t a sentence. You need to add a verb and complete what you want to say. The park near the sea is better than the one by the lake. The park near the sea was destroyed ten years ago. The park near the sea will be improved next year. The park is near the sea says where the park is.

thank you

not exactly, you would use them in different contexts. "The park near the sea" if you were comparing parks. Example: I prefer the park near the sea versus the park that is closer to the city. The second example you would use to if you are describing location. Example: The weather is often chilly as the park is near the sea.