1. Present perfect tense: "I've done" shows experience up to now, which is appropriate for talking about life experiences.
2. Use of gerunds: "visiting," "going stargazing," "collecting," and "trying" are all gerunds used after prepositions or as objects, which adds variety and fluency to the sentence structure.
3. Relative clause: "which makes me feel closer to nature" is a non-defining relative clause, giving extra information about the previous activities.