Tallest sea stack
- Who
- Ball's Pyramid
- What
- 561 metre(s)
- Where
- United Kingdom
- When
- 01 January 0001
The world's tallest sea stack is Ball's Pyramid near Lord Howe Island (Australia) in the Pacific Ocean, which is 561 m (1,843 ft) high but has a base axis of only 200 m (660 ft).