Dells refer to small, secluded valleys or ravines that are usually wooded and have streams running through them. Synonyms for dells include glens, hollows, gorges, canyons, chasms, and ravines. Glens are typically narrow valleys with hills on both sides and a stream flowing through the middle while hollows refer to low-lying areas that are surrounded by hills or mountains. Gorges, canyons, and chasms usually have steep walls and are formed by erosion from water or wind. Ravines are similar to gorges, but they are smaller in size and are characterized by streams that run through them. All these synonyms describe areas of natural beauty with stunning landscapes and picturesque scenery.