The draining lava left long, tube-like caverns. Of the four caves in this particular cluster, only Boyd Cave is now open to hikers. Arnold Ice Cave is filled with ice. Skeleton and Wind Cave were open to hikers until 2007, when they were gated closed to prevent vandalism and protect hibernating bats.
On the other hand, asthma is an ongoing chronic condition that has acute flare ups and chronic pulmonary insufficiency due to airway reactions that cause the bronchial tubes to be partially obstructed. This results in shortness of breath, chronic cough, frequent chronic bronchitis, chronic pneumonia and wheezing.
Shortness of Breath. Difficulty breathing or shortness of breath, also called dyspnea, can sometimes be harmless as the result of exercise or nasal congestion. In other situations, it may be a sign of a more serious heart or lung disease. Cases of frequent breathlessness should be evaluated by a physician to determine the cause.