Solution pockets are variably-shaped cavities extending into the walls of limestone caves. They are dissolutional features, usually preferentially developed along certain bedding planes (most likely representing minor unconformities). They are also often developed along joints in cave ceilings. Solution pockets appear to form principally during high-flow events (floods) in the phreatic zone, which results in slightly acidic water being forcefully infiltrated along bedding planes and joints.

These examples are in Gothic Avenue, in western Kentucky's Mammoth Cave, the longest cave on Earth. As of fall 2017, 412 miles have been explored and mapped.

Gothic Avenue is developed in limestones of the Paoli Member of the Girkin Limestone (lower Upper Mississippian). This cave passages is at level B in the Mammoth Cave system. Level B is the 2nd-oldest and 2nd elevationally-highest set of passages in the system. Level B passages started forming during the Pliocene, 2 to 4 million years ago. A subterranean river used to flow through here.