Henderson Island, a tiny, uninhabited island in the middle of the Pacific Ocean, halfway between New Zealand and Chile, is estimated to have 38 million pieces of trash washed up on the beaches, the highest recorded.
Almost all of the garbage found on Henderson Island was made from plastic.
There were toy soldiers, dominos, toothbrushes and hundreds of hardhats of every shape, size and colour.
Researchers say Henderson Island is at the edge of a vortex of ocean currents known as the South Pacific gyre, which tends to capture and hold floating trash, and it could possibly sink again.
They found the trash weighed an estimated 17.6 tonnes and that more than two-thirds of it was buried in shallow sediment on the beaches.
A dead sea turtle was found caught in an abandoned fishing net and a crab that was living in a cosmetic container.