“The Monster” (aka “Dream Big”) is the brainchild of Stockton, California’s Greg Dunham, and it’s in the Guinness Book of World Records as the world’s tallest working motorcycle.


At 11’, 3” tall, and 20’ 4” long, this 6500 pound monster needs a 502 cubic-inch engine (giving 500 horsepower) yoked to 2-speed transmission to make it move. And move it does—Dunham claims the big boy will rumble to a terminal velocity of 65 miles-per-hour, which must be make for one hell of an interesting sensation.


By the builder’s reckoning, Dream Big cost big—around $300,000. The unique project took three years to conceive (it was completed in 2005), and can occasionally be seen at various car and bike events.