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.

The Al-Qassim region is perhaps the lushest part of the Kingdom of Saudi Arabia, responsible for much of the country's agriculture. The area around Buraidah is rich in farms, orchards and palm trees that are free for tourists to visit and admire. You can also buy produce directly from the farmers.

Since 1983, the goal of the Boston Fire Museum has been not only to maintain the old firehouse building, but to display and preserve antique firefighting equipment and memorabilia from the Greater Boston area and educate the public on fire safety.