On any given day at this Denver landmark, there could be goat yoga, ice skating, beer tasting, live music and fine art. You might even meet former Broncos quarterback and Super Bowl champion Peyton Manning. This isn’t some all-inclusive Rocky Mountain vacation or a VIP state tour. It’s Denver International Airport — and in some ways, airports the world over — in the year 2018. Air travel is surging globally, and DIA and other airports that are spending billions of dollars to lure more flights and revenue are also embracing far-flung ideas designed to make passengers feel less like cattle and ease the stress of flying. “Airports have changed,” said Stacey Stegman, DIA’s vice president of communications, marketing and customer service.