The world’s largest iceberg is moving again -.

More than 30 years ago, in 1986, the world’s largest iceberg formed when a clump of ice broke off from the Antarctic coastline and began floating in the ocean. That iceberg became known as A23a and was calculated to be nearly 4,000 square kilometers in size, which is larger than the Greater London area.

When A23a originally broke off, its massive size caused it to essentially become stranded in the Weddell Sea, where it has remained for more than 30 years, but as BBC News reports, the iceberg is now moving again and drifting into deeper waters as it begins its journey north. It is reported that the iceberg is about to leave Antarctic waters for the first time.

For those concerned that the iceberg could end up on their shores in the future, it is said that the iceberg will eventually find its way into the Antarctic circumpolar current, essentially putting it on a path to what has become iceberg Lane.