Sensory doesn't have to be exclusive:
A rich sensory experience doesn't need to be specific to a single location. It just needs to create a vivid experience. If you want to show poverty, the smell of garbage paints as fine a picture as a detailed description of peasant clothes. Describe the things you CAN describe, like the lapping of waves against a shore, or the ringing of a bell your character doesn't know the meaning of.
Your character may not understand what they are looking at anyway, and describing the genus and species of flower doesn't add to the experience. In fact, ignorance can be in your favor - describe the spices as pungent, flowers as unfamiliar, and the fruits as strange yet pleasant. I doubt there's anywhere in the world you can't find tiny yellow flowers in a field. The very exoticness and difficulty in explaining it will come off as accurately portraying the MC's unfamiliarity with the environment.
Even if you have a picture of the place somewhere you are trying to create, describe what you can see. How many buildings are you going to describe? You have a picture of a little Greek island somewhere with white-washed walls, flagstone steps, and possibly a scooter shop. Stick to describing the things you can know, and while this might limit you slightly, I doubt it will hold you back much.
And the details don't have to conform perfectly to a single place. In the modern world, you can find a modern chain coffee shop next to a dilapidated tin shed and a crumbling stone building with a warning sign on it for people to keep out anywhere in the world. Old buildings will have electrical wiring sticking out of walls in odd places and random, after-the-fact pipes in the walls. Posters of places exotic to the locals but familiar to your character will seem out of place.
Many sensory experiences are universal anyway. Gravel streets crunch under the feet everywhere. The air holds the smell of dead fish, the flagstones are dirty with dried mud but warm from the sun, and the locals speak a language the MC doesn't know, yet the joy in their hearts at greeting a guest and bringing out fresh-baked bread with just a hint of something undefinable in the seasoning that reminds them of anise. It could be any village by any sea in the world.