Karst is a type of landscape where the dissolving of the bedrock has created sinkholes, sinking streams, caves, springs, and other characteristic features.
Click images to enlarge. The honey locust tree, or honeylocust, is a fast grower and is considered invasive by some. Flowers are not especially showy. The honeylocust tree is so named because of the taste of the inner flesh of its pods, which appear in fall and unlike the black locust tree, is not toxic.
The black locust (Robinia pseudoacacia) grows to 80 feet in height and 50 feet in width, making it a large shade tree that grows in many types of soils and light exposures. In summer, the smooth seed pods eventually ripen to brown and are about 4 inches long.