How Would You Describe A Swamp In A Story?

How Would You Describe A Swamp In A Story? Here are some adjectives for swamp: silent, sneaky, bacteriological and radiological, old, semi-tropical, great dismal, little but eternal, gigantic dismal, dense and permanent, low unwholesome, entirely flat and featureless, dank and pestilential, thy pestilent, once dismal, mushy cold, pure total, moist, primeval. How would you describe