Britain’s latest tourist attraction may have an unusual name, but the ‘Fat Slag’ is actually something you can walk over.

The 400 metre-long work of art is a slag pile made up from 1.5 tonnes of waste, skimmed off during the smelting of metals, sculptured into the shape of a reclining naked woman.

Although it was named Northumberlandia by its creator Viscount Matthew Ridley and landscape architect Charles Jencks, the ‘fat slag’ tag as it is affectionately known by the locals, seems to have stuck more.

Commuters on the London to Edinburgh train can clearly see the $4.5 million sculpture.

When completed, the fat slag will be the world’s largest human land-form, measuring 400 metres long, 253 metres wide, 34 metres high at her tallest point and her breasts reaching 30 metres into the air.

Local resident Michele Gray said the tourist attraction is a bit wacky and seems a “bit of a daft thing to do”.

“I can see what they're trying to get at but personally I'd rather have real countryside, not so messed about with by man.”