Rijeka, Croatia

CREDIT: ISTOCKPHOTO/GETTY IMAGES

With amazing views of the Adriatic coast, blockbuster beaches, and a colorful Baroque heart — not to mention one of the world’s biggest Carnival celebrations — it’s a wonder that Rijeka isn’t better known. But despite ticking pretty much every conceivable vacation box (toss in world-class museums, a bevy of top restaurants, and cinematic hikes in the surrounding mountains), it remains an under-the-radar Adriatic treasure. That’s all set to change in 2020, when Croatia’s third city is honored as a European Capital of Culture. Plenty is planned within the port town to mark the occasion: more than 1,000 official musical performances, literary events, art exhibitions, and parties; the multimillion dollar overhaul of the historic Sugar Refinery building into the Rijeka City Museum; and the addition of Hilton’s new five-star resort, the Costabella, in April. But perhaps most anticipated is the reopening of the ship Galeb (“Seagull”). Used as Tito’s personal mobile home while he was President of Yugoslavia, the yacht — where countless global leaders and celebrities were entertained — is being refurbished and transformed into a museum ahead of Rijeka’s moment in the global spotlight. —Jonathan Thompson