I’d rather be in the mountains thinking of God, than in church thinking about the mountains. (John Muir, 19th century Scottish-American naturalist)
Certainly God has revealed Himself in nature, so Muir’s thought is helpful. The beauty of a sunrise or a sunset over the mountain peaks can evoke very deep and reverent thoughts about the Creator. But, really it’s not an either or dilemma. One surely can worship in the outdoors, but worship with others in a church setting is not to be overlooked.
The heavens proclaim the glory of God. The skies display his craftsmanship. (Psalm 19:1) Let us not neglect our meeting together . . . but encourage one another. (Hebrews 10:25)