The National Aquarium, located in Baltimore’s Inner Harbor, is home to more than 11,000 aquatic animals representing 660 species of fish, birds, amphibians, reptiles, and marine mammals. Popular features include a tropical rainforest habitat with sloths and piranhas, the immersive 4-D theater, and the thrilling shark walk, where you can peer into a tank full of these apex predators.

Teatro alla Scala, opened in 1778, is one of the most famous opera houses in the world. A visit to the museum grants you a sneak peek inside the theatre itself and the glamour that goes along with it. You’ll be able to visit one of its spectacular theatre boxes overlooking the stage.

This nature reserve offers plenty to entertain visitors, but its definitive highlight is the nightly parade of penguins returning ashore and heading to their sand dune homes at sunset after spending the day hunting for fish. Expect to sight anywhere between a couple of hundred to a couple of thousand penguins.

Crowning Girona’s skyline, the Cathedral of Santa Maria commands attention from the top of a majestic 86-step staircase. Its soaring Baroque façade, added in the 17th century, belies a far older history: foundations date to the 5th century, with a Romanesque church and 12th-century cloister still preserved within. The cathedral’s most notable feature is the 23-metre-wide Gothic nave (widest in the world!) completed in the 14th century and illuminated by vast stained-glass windows. Inside, the Museum of the Cathedral safeguards extraordinary treasures, including the 11th-century Tapestry of Creation, a vivid Romanesque depiction of divine order, and a gem-studded 14th-century silver altarpiece. The cloister captivates with carved capitals portraying biblical tales and mythical beasts. For context, use the included audio guide to unravel layers of history, from Roman forums to medieval masterpieces.