This masterpiece of Italian Gothic architecture is most famous for what it’s missing—a roof. The abbey was built in the late 1100s and has been a dramatic-looking ruin for centuries. It’s open to the sky now, but still feels grand in a stripped-back kind of way. Just up the hill, the Rotonda di Montesiepi is worth a quick stop too—inside you’ll find a sword embedded in stone, tied to the story of Saint Galgano.

While in Cologne, you can visit Germany's oldest city hall, with parts dating back to the 11th century. Over time, it has picked up a mix of styles—Gothic tower, Renaissance loggia, some modern touches. The 61-metre tower is covered in carved figures, including some cheeky ones from local history, and the bells chime four times a day. There’s also a mechanical face called the Platzjabbek that sticks its tongue out on the hour. Inside, the Hansasaal is the main historic hall—worth a look if it’s open.

Hornblower’s “Voyage To The Falls” Niagara Cruise will take you from the Canadian docks at the base of the Great Gorge, past the American Falls, Bridal Veil Falls and the awesome up-close and personal connection with the thundering water, awesome power and amazing mist of the mighty Horseshoe Falls. Voyage To The Falls departs every 15 minutes and starts early each day with the Early Morning Sunrise Cruise. For a truly extraordinary, once-in-a-lifetime experience visitors can choose the Falls Illumination and Falls Fireworks Cruises. Set to dazzling city lights, Falls colored Illumination and Niagara Falls Fireworks, guests will enjoy on-board licensed bar service with snacks while marveling at the nighttime Falls spectacle. Whatever you choose, any Hornblower Niagara Cruise will be the highlight of your visit and the thrill of a lifetime.