Downhill long boarders in Portugal had a cobblestone problem. As anyone who rides a bike, roller skates, blades, or skateboards in a city with cobblestones knows, riding over cobblestones is no fun, and impossible to do fast. But these creative skaters noticed a possible workaround–the tram tracks that ran down many of these streets. They designed a new kind of board with one wheel in the middle of the board in the front, and two normal wheels in the back. The front wheel slides into tram tracks while the back wheels stabilize the board, allowing them to cruise down formerly impossible-to ride streets with ease.
Their innovation has spread around the world, to cities with tram tracks from San Francisco to Rio de Janeiro, creating a new extreme sport. Skating like this looks pretty dangerous, and we’d guess that hijacking tram tracks like this is also probably illegal. But it also looks like a whole lot of fun.