A number of eye-popping gemstones have been discovered this year. They include this 910-carat diamond, which was unearthed in a Lesotho mine by British firm Gem Diamonds back in January. Following the “landmark discovery”, the UK company's share price surged by 15%.
The search hotted up last year when a mysterious figure approached the company that insured the shoes with info on their whereabouts. The FBI mounted a sting operation, and the Ruby Slippers were eventually found in Minneapolis in August. The thief however remains at large.
Read more about the ruby slippers, plus the world's other most valuable movie memorabilia
The heatwave summer and persistent drought Europe experienced this year uncovered prehistoric ruins, ancient garden designs and more as landscapes were scorched dry and waterways dried up. The River Danube dropped to record lows last month, revealing some valuable secrets.
The fabled treasure that is said to buried in the booby-trapped 'money pit' on Oak Island in Nova Scotia, Canada has eluded countless explorers for three centuries and claimed six lives. The treasure hunt is the subject of History Channel Show The Curse of Oak Island, which enters its sixth season this month.
In January, divers from Blue Water Ventures International and the Endurance Exploration Group pinpointed the wreckage of the Pulaski, a luxury steamship that exploded and went down off the coast of North Carolina in 1838 with the loss of 200 lives.
Read about whether these are America's luckiest-ever treasure hunters
Considered the Titanic of its time, the steamship was packed with wealthy passengers, and had a particularly high-end cargo. Artefacts recovered from the wreck include an exquisite gold chain, a pocket watch in solid gold and scores of silver coins.
Too big for a shipwreck and too oddly shaped to be made by nature, the USO, which is the size of two football fields, has baffled experts, and Miklos has speculated the bizarrely formed object might very well be an alien spaceship that crashed into the Atlantic Ocean thousands of years ago.
Now discover 20 of the world's most valuable stolen treasures