For decades, drivers in Portland, Maine, sped by Thompson’s Point, a forlorn peninsula jutting into the Fore River just west of Interstate 295. Described as “the biggest dump in Portland” in the local independent monthly The Bollard in 2011, the area today is the city’s most unlikely hot spot. In 2015, a new outdoor concert space began staging shows on the riverbank; this past summer’s slate of 14 performances included Wilco, the XX and Alabama Shakes. And nearby, an abandoned warehouse has been transformed, with food-and-drink establishments alongside a cryptozoology museum and a circus school. One more reason to stop: a new ice skating rink open through March 4.