Derry stands on the banks of the River Foyle in Northern Ireland and is known for its intact seventeenth-century city walls, steep streets, and strong local identity.

Arequipa, known as the "White City," is built from sillar, a pale volcanic stone that glows in the sunlight. This architectural detail gives the historic center its striking appearance and has earned it recognition as a UNESCO World Heritage Site. Towering above the city is the perfectly symmetrical Misti Volcano, which, along with two neighboring peaks, forms a dramatic backdrop.

A religious center since the 4th century, it has numerous churches and religious sites. It is the fourth largest city in France, located in southern France near the border with Andorra.

Kraków lies in southern Poland along the Vistula River and serves as one of the country’s most recognized cultural centers. Its layout is shaped by a well-preserved historic core, with streets radiating from a large central square. The city retains a human scale, where daily life unfolds among historic buildings, universities, and markets. It stands apart for its continuity of urban life, where medieval structures coexist with modern institutions without dramatic contrast.

Exeter sits in southwest England at a natural crossing of the River Exe, a position that has shaped its role since Roman times.