5 Best Sights in The Veneto and Friuli–Venezia Giulia, Italy

A 19th-century castle on the Gulf of Trieste, this is nothing less than a major expression of the culture of the decaying Austrian Hapsburg monarchy: nowhere else—not even in Vienna—can you savor the decadent opulence of the last years of the empire. Maximilian of Hapsburg, brother of Emperor Franz Josef and the retired commander of the Austrian Navy, built the seafront extravaganza between 1856 and 1860, complete with a throne room under a wooden ceiling shaped like a ship's keel. The rooms are generally furnished with copies of medieval, Renaissance, and French period furniture, and the walls are covered in red damask. In 1864 Maximilian became emperor of Mexico at the initiative of Napoléon III. He was executed three years later by a Mexican firing squad.

During the last years of the Hapsburg reign, Miramare became one of the favorite residences of Franz Josef's wife, the Empress Elizabeth (Sissi). The castle was later owned by Duke Amedeo of Aosta. Changing exhibitions in the revamped Sala Progetti showcase the impressive museum archive. Tours in English are available by reservation via  coopculture.it. Surrounding the castle is a gorgeous 54-acre park. To get here from central Trieste, take Bus No. 36 from Piazza Oberdan; it runs every half hour.

The Venetian Republic ordered the creation of Padua's botanical garden in 1545 to supply the university with medicinal plants, and it retains its original layout. You can stroll the arboretum—still part of the university—and wander through hothouses and beds of plants that were introduced to Italy in this late-Renaissance garden. A St. Peter's palm, planted in 1585, inspired Goethe to write his 1790 essay, "The Metamorphosis of Plants." The wonderful museum opened here in 2023, contains fascinating botanical collections and multimedia displays that explore the garden's history and evolution of plant use in medicine.

Only Rome's Colosseum and Capua's arena would dwarf this amphitheater, built for gymnastic competitions, choreographed sacrificial rites, and games involving hunts, fights, battles, and wild animals. Although four arches are all that remain of the arena's outer arcade, the main structure is complete and dates from AD 30. In summer, you can join up to 16,000 for spectacular opera productions and pop or rock concerts (extra costs for these events). The opera's the main thing here: when there is no opera performance, you can still enter the interior, but the arena is less impressive inside than the Colosseum or other Roman amphitheaters.

Sitting on the summit of Monte Pauso, the origins of fortifications here stretch back to the turn of the first millennium, and a guided tour of the castle delves into its bloody history, and the lives and tastes of its former residents. The fairytale-like castle form makes it a fine backdrop to the giant chess game staged outside the impressive drawbridge and crenellated, pitted walls. Legend has it that the moat was the watery, muddy realm of an Egyptian crocodile brought here by the town's most famous son, the physician and botanist Prospero Alpini (1553–1617). The atmospheric interiors house collections of court clothing including those of the Venetian Podestà, arms and armature, and a fresco attributed to Mantegna (1454–57). The Sale Espostive stages exhibitions and cultural events, and has a curious sculpture of doge Foscari kneeling before the lion of San Marco.

Extensive grounds with rare trees, ornamental fountains, and garden follies surround this extraordinary palace in Stra, 13 km (8 miles) southeast of Padua. Built in 1721 for the Venetian doge Alvise Pisani, it recalls Versailles more than a Veneto villa. This was one of the last and grandest of many stately residences constructed along the Brenta River from the 16th to 18th centuries by wealthy Venetians. Gianbattista Tiepolo's (1696–1770) spectacular fresco on the ballroom ceiling, The Apotheosis of the Pisani Family (1761), alone is worth the visit. For a relaxing afternoon, explore the gorgeous park and maze.