Our surroundings have an immediate, visceral effects on us. They can also have a lingering effect, revisiting our thoughts over time.
Take some place—somewhere you go each week, a place you've traveled or perhaps a spot you've visited at various times in your life—and describe what it's like to go there. Use sensory details to make the place come alive. Just as important as the physical place are the emotional and existential impacts of place. What stories come up as you start writing about the place? Maybe it's the circumstances of your visit, a self-transformation, or the experience of meeting someone there that speaks to you. Allow yourself to follow multiple threads.
Review your writing. What's juiciest? Review some photos, do research online, look for writings about the place from other people. How do your findings impact your initial writing?
Now choose a focus and a format for your piece. Develop that juiciest bit. See what else comes forth. Create a shaped piece from the effort.
Then go back and examine some of your other threads. Is there other material you might develop in another way? Explore.