Deepest shaft occurring naturally
- Who
- Vrtoglavica
- Where
- Slovenia (Mount Kanin,)
- When
- 01 January 0001
Vrtoglavica (meaning vertigo) is an unbroken vertical shaft 603 m (1,978 ft 4 in) deep in Monte Kanin, Slovenia.
It could comfortably accommodate two Eiffel Towers.