#Video: When you don't know the end!👇⚫️⚫️⚫️⚫️
What's that?The cave of swallows
Where's that?an open air pit cave in the Municipality of Aquismón, San Luis Potosí, #Mexico.
Guess what! A person without a parachute would take almost ten seconds to freefall from the mouth to the floor, hence the pit is also popular with #extreme #sports enthusiasts for BASE #jumping.