Even if you aren't a fan yet, you'll fall in love with opera after attending a production at the Santa Fe Opera House. With acclaimed singers from around the world visiting, the opera produces grand productions from classical composers to modern day favorites. Call or go online to check out performance times.

Start your stay in Lille by exploring the old part of town and wandering along Vieux-Lille's cobbled streets. Apart from fine examples of old Flemish architecture, the area contains a plethora of small boutiques and cosy cafes. Do not miss the charming little Place aux Oignons.

Enclosed within a protective wall reaching up to 20 m 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.

Take a cable car over the Rhein and experience Cologne from above. Rides start from Cologne Zoo or from the Rhein Park, so you can visit both in one afternoon.