Narrated Abu Huraira (radiallaahu `anhu):
The Prophet (sallallaahu `alayhi wasallam) said, "Dhus-Suwaiqa-tain (literally: One with two lean legs) from Ethiopia will demolish the Ka'ba."
This Hadith talks about the end of times, when people will have forgotten the Quran altogether, and there'll be no khayr (good) on Earth. The time when Ka`bah will also be removed from Earth, as it is also 'good'. Black/Ethiopian people will rise to power and it'll be one among them who'll demolish the Ka`bah. And Allah knows best.
Taken from: http://ilookilisten.wordpress.com/2013/02/13/kabah-to-be-demolished-once-more-hadith-no-1361/