Oil stains, acrid gasoline smells, billowing clouds of exhaust—visitors won't find any of these at Speed Raceway. An indoor go-kart facility that employs as much eco-friendly technology as possible, the center's Italian-made OTL Storm Karts run entirely on electricity. But that doesn't mean they're lacking in horsepower. Each reaches speeds of up to 45 miles-per-hour, according to Philadelphia Magazine, which included Speed Raceway in its 2013 Best of Philly feature. With two European-style tracks, drivers can hit top speeds on straightaways before sliding around hairpin turns over 12 laps for kids or 14 laps for adults.

Despite the velocities reached, safety remains of paramount importance. Race officials use colored flags to communicate with the drivers: green means "race away," yellow means "ease up while a situation is being resolved," and teal means "hey, look at this teal flag I found in the closet." At the end of each race, every participant receives a printed results sheet complete with lap times and statistics.