2. From Anonymous to England

Inheritance: About $465.6 million

In 1928, an anonymous donor left about 500,000 pounds to the British government to be used to pay off the "entire national debt." The problem is, fulfilling the donor's stipulation is difficult, seeing as the national debt now exceeds 1 trillion pounds.

Although the original donation is now worth about 350 million pounds — or roughly $465.6 million — it's only enough to scratch the surface. The current fund managers at Barclays have tried to find some legal grounds to release the funds from the long-deceased good Samaritan to the Treasury, but have not found a solution as of yet.