Rail services from Sussex and Surrey to London have been disrupted by a landslide at Ockley for the past three weeks.
Repairing the damage is a mammoth task for Network Rail.
And commuters face many more days of disruption. Charlotte Wilkins has been to have a look.
Repairs are underway in Ockley to fix a landslide that caused 40 meters of an embankment to collapse.
The heavy rain over Christmas caused the land between Horsham and Dorking to fall away on Boxing Day.
The repairs are likely to continue until next month as an access road needs to be built for heavy machinery to get through.