The Cave of the Swallows is a large vertical cave located in San Luis Potosí, Mexico. It is known for its impressive depth of about 376 meters (1,230 feet) and is one of the largest cave shafts in the world. The cave is a popular site for base jumping and attracts adventure seekers from around the globe. The cave gets its name from the numerous swallows that nest in its walls. These birds are known for their acrobatic flying and can be seen diving in and out of the cave. The unique ecosystem and stunning geological formations make the Cave of the Swallows a significant natural attraction.