Start by looking through your images from an experience. At first, you are not looking for bigger themes or conclusive thoughts, just details. You might be fortunate to have physical/digital photographs, or you may be pulling from memory.
Let these images inspire free-form writing of details, sensory or mental.
Headlines in kanji and colors. Tobacco on display. Blue-ponytailed nonchalance.
Educator and contributor to the National Writing Project Ann Gardner explains in an article that poetry is about constructing images. In order to teach her students how to write place-based poetry, she explains her mental process of developing ideas for poetry, step by step:
While travel writing can take the form of poetry, the method of sifting through images, pulling out details, and reconstructing these images with words can result in rich moments a reader can envision. These details can be raw materials for a bigger essay or narrative. Sometimes providing the images isn’t as fun as letting the reader envision them by your words.