Milan's architecture is not only neoclassical promenades, Gothic cathedrals and posh villas — Porta Nuova district is the new and modern revitalization project that has drastically changed the city. Take a walk around the Diamond Tower, the Unicredit Tower and many other glass and steel structures. The stars of the show here are the two skyscrapers known as Bosco Verticale (Vertical Forest). Featured in all major architecture outlets, these residential towers have actual live trees growing on its facade. They look marvellously lush in the spring and summer and totally enchanting covered in snow and frost.

The Ketchum Sun Valley Historical Society has been expanding its collection of historical artifacts since the mid-1990s. At the Wood River Museum, you can learn about the evolution of ski culture in the region from its beginnings and learn about the life of Ernest Hemingway, who found his final home along the Big Wood River in the Sun Valley.

Enclosed within a protective wall reaching up to 20 metres in width, the Ciudad Amurallada (or Walled City) is Cartagena's old beating heart. Packed with well-preserved colonial buildings, it's a pleasure to stroll through; its streets of colourful low-rise merchant homes marked by iconic balconies are now mostly walked by either tourists or students who attend classes at the University of Cartagena during the day and linger for meals and nightlife after school is out. Cafes in Plaza Aduana and Plaza Santo Domingo teem with patrons, forging an incredibly jovial atmosphere; the districts of San Diego and El Centro are two not to be missed. There is plenty of food and shopping to be had, with a mixed bag of world-class restaurants and street food hawkers and the incredibly photogenic palenqueras — women dressed in vibrantly coloured clothing selling fruit in the streets — images of whom have become emblematic of Colombia as a travel destination.