Competitors take part in Santa-themed races.
Surfers challenge big waves at Portugal's Praia do Norte.
Participants in historical costumes ride high-wheel bicycles in Prague.
Hundreds of sailing boats gather in the Gulf of Trieste.
Catches that came close — but not close enough — this season.
Competitors race their homemade soapboxes at the Red Bull Soapbox Race in Amman, Jordan.
On the starting line with drivers and spectators at the Great Lakes Dragaway.
Cars battle cars at the Kinmount Fair.