While browsing some of the many sites I like to visit I came a cross an article about a crazy whirlpool/sinkhole that was discovered in Dviete Parish, Latvia.  After watching the video, I was amazed at how much debris the hole took in without stopping.  It looks to be at the bank of a river in the middle of its spring thaw.  The hole seems to suck in everything that goes near it, even large sheets of ice.  Watch the video bellow to see it in action:

Sources: Above Top Secret and MSN