Extreme sports are no longer just about skateboarding, dirt bike racing, paragliding, bungee jumping and snowboarding. In a desire to keep challenging themselves, folks have come up with all kinds of bold and beautiful things to do like sky flying, caving, free-diving, cheese rolling, barefoot water skiing and even going over Niagara Falls in a barrel.

And so the definition today of the extreme sport has evolved to include any sport that offers an adrenaline rush. If you’re one of these people that likes to feel your heart pumping and your nostrils flaring there are literally thousands of challenging choices out there on earth, in the air, on water, by motor or on snow.