Valladolid breathes history. This is the place where King Felipe II was born, the Catholic Monarchs Ferdinand and Isabel were married, and Christopher Columbus died. This was once the capital of Spain, and although it has lost this title, it's still the principal city of Castilla y Leon, the land of castles from which the word ‘Castilian’ is derived. Today, Valladolid is a bustling university city that thrives on its manufacturing industries. It is a down-to-earth, lively place that blends the old with the energetic new.

Cambridge is a city oozing with history and tradition at every turn. The cityscape is dominated by the university, with its 31 colleges and their extensive green gardens, known as the "Backs," spread throughout the city. Throngs of students making their way to class or lounging by the banks of the River Cam, books in hand, as punters lazily float by, enhance the academic feeling of this centuries-old centre of scholarship, along with the numerous fascinating museums and cultural events that take place in the city.

Ljubljana, Slovenia's capital, captivates with its romantic bridges and scenic waterways. The city's architecture showcases its rich cultural heritage. The historic centre, at the foot of a hill topped by the iconic Ljubljana Castle, is compact and easily explored on foot or by bike. Surrounded by lush landscapes, the city offers abundant opportunities for hiking, cycling, and outdoor activities.

San Juan is the vibrant, cosmopolitan capital of the island of Puerto Rico. Encompassing hundreds of years of history, the city blends Spanish-era historic sites, such as the San Felipe del Morro fortress, with modern entertainment and fashionable shopping districts. More than a million people call San Juan home, while hundreds of thousands of tourists call it their favorite place to vacation each year.