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.
Thornless, Podless, Non-Messy Honey Locusts: Shademaster and Sunburst. First of all, note that there are various kinds of locust trees. For example, black locusts are classified as Robinia pseudoacacia. But even within the Gleditsia genus, we have: Gleditsia triacanthos, thorny locusts. Gleditsia triacanthos var. inermis, thornless locusts.