Wind Cave National Park

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Price: £4.99 (£4.16 exc. VAT)

Size: 7.7 MB

EAN: 5055351154464

Credits: USGS

Approx US$6.39

USGS National Park - Wind Cave

Wind Cave is distinctive for its calcite fin formations called boxwork and needle-like growths called frostwork. The cave, which was discovered by the sound of wind coming from a hole in the ground, is the world's densest cave system.