First, river surfing -- riding waves on a surfboard in a river -- is an actual thing. Second, very few rivers qualify. Third, because of the aforementioned second, we've gone ahead and compiled a list of the eight best. Now go, surf upon rivers.

Eight Top River Surfing Spots In The World Slideshow

Eight Top River Surfing Spots

#8: South America's Amazon River may not always be good for surfing, but in Brazil, where the mouth meets the Atlantic Ocean, there's a tidal bore called the Pororoca which, in February and March, creates swells as high as 13ft. Ride 'em, vaquero! More From Thrillist: Ride All The Climbs Of The 2013 Tour De France

Eight Top River Surfing Spots

#7: Proving that Munich's got more to offer than just beer halls and lederhosen-sporting fraulein, the Eisbach River has a standing wave in town that's ridden by up to 100 peeps each day. More from Thrillist: The Great American Beer Fest

Eight Top River Surfing Spots

#6: Believe it or not, that dude isn't surfing in the year 2096; he's riding China's Qiantang River, AKA the "Silver Dragon". This badass waterway sees waves of nearly 30ft that travel 25mph along the skyscraper-lined shores of Hangzhou. More from Thrillist: A 5 Star Camping Dinner You Can Cook Yourself

Eight Top River Surfing Spots

#5: The River Mur in Graz, Austria, has two waves -- both are built by hand, using precisely-placed underground rock formations to constrict the flowing water. Prepare to look way more badass on it than those silly kayakers. More from Thrillist: These Are The Country's Craziest Eating Challenges

Eight Top River Surfing Spots

#4: A tubular tidal bore at the mouth of the River Severn in England near Gloucester, the Severn Bore was first surfed by Jack Churchill, the only Allied soldier in WWII to kill an enemy using a FREAKING LONG BOW. This bore has 7ft waves that have been known to carry boarders more than five miles downstream. More from Thrillist: Birdie An Extreme Global Gold Challenge

Eight Top River Surfing Spots

#3: Add "surfing" to the list of shredding options at Jackson Hole, as the Lunch Counter rapids in the Snake River manage to create wave-machine-perfect conditions. More from Thrillist: Score Tickets While Traveling