Located in the Old Town, this was the official Key West residence of Nobel Prize winning author Ernest Hemingway, as in 1968 it enjoyed the distinction of becoming a U.S. National Historic Landmark. Tour the spectacular gardens, with an impressive variety of flowers and trees, and observe the 20,000-dollar swimming pool — an unusual opulence at that time. You'll also be able to visit the bookstore lined with the author’s famous books and a plethora of other souvenirs.

Tiananmen Square is where Mao Zedong announced the founding of the People’s Republic of China in 1949. The square is dominated by the red Tiananmen Gate and Mao’s enormous portrait, which you’ll see everywhere. Every morning at sunrise, there’s a flag-raising ceremony, and on the first day of the month, it’s done with a military band. The square is also home to the Monument to the People’s Heroes, a 38-metre granite obelisk in the centre, and the Mausoleum of Mao Zedong, where people still queue to pay respects.

The prettiest street in Zagreb is home to shops, art galleries, restaurants, and cafes in colourful, steep-roofed 19th-century houses. Don't miss a stroll in this lively pedestrian area during your stay in Zagreb.

Undoubtedly one of the world’s top tourism destinations — and officially one of the New Seven Wonders of the World — the Great Wall stretches for thousands of kilometres across northern China. From Beijing, the easiest section to reach is Badaling, about 70 km from the city. It’s well restored and has a cable car, but it also draws the biggest crowds. Mutianyu is another popular choice with fewer tour groups if you go early. For a wilder feel, head to Simatai or Jinshanling, where much of the wall is original and the hikes are longer. Huanghuacheng is partly submerged by a reservoir, so you get the unusual sight of watchtowers half surrounded by water.