If you don't have the time to visit the larger (but much farther) Litchfield or Kakadu National Parks, Charles Darwin National Park is a convenient alternative. Located a short distance from the city centre, just south of the airport, the area is one of the country's most important wetlands. It showcases 36 mangrove species and holds significant Aboriginal and historical importance.

This small aquarium in Phuket provides an educational and entertaining outing for all ages, highlighting the beauty and complexity of Thailand's aquatic ecosystems. See coral reef displays, walk through an underwater tunnel, and engage with marine creatures at a touch pool.

You can’t really miss it—Florence’s cathedral (Cattedrale di Santa Maria del Fiore) dominates the skyline with that massive red-brick dome. Construction began in the 13th century and continued for nearly 150 years, which is evident in the diverse styles. The outside is covered in pink, green and white marble—oddly beautiful up close. Inside, check out Vasari’s Last Judgment fresco under the dome. If you’re up for the climb (and it is quite a climb), the view from the top is worth the leg burn.