Santa Marta, located on Colombia’s northern Caribbean coast, is one of the country’s oldest cities, founded in 1525. It has long served as a gateway between the coast and the Sierra Nevada de Santa Marta, the world’s highest coastal mountain range.

Takayama, located in Japan’s mountainous Gifu Prefecture, is a city where traditional culture and natural beauty are remarkably well preserved.

Potosí rises on the Altiplano of southern Bolivia and for centuries it was one of the richest cities in the world because of what lies just beyond its streets. At the foot of Cerro Rico (“Rich Mountain”), silver was discovered in the mid-1500s, and within a few decades the city became a center of mining and wealth that shaped global trade and economies.

The turnoff for Locarno is located near Bellinzona, the capital of Ticino. By train, Locarno is well served from Zurich and Milan, as it is by road. Lovers of beautiful landscapes starting out from Geneva and Lausanne owe it to themselves to pass through Simplon and the Centovalli by taking the picturesque little train that links Domodossola to Locarno.

Delhi is a sprawling metropolis in North India that contains the country's capital, New Delhi. Life is abuzz and hectic here, with traffic going every which way. A huge population shuffles through Delhi's streets, alleys and food and spice-selling bazaars, and it's quite memorable to be a part of it all.