In which city has the record breaking tallest sandcastle in the world been built, as recognised by Guinness World Records?

Introduction / Context:
Guinness World Records tracks unusual and impressive achievements around the world, including record breaking constructions such as the tallest sandcastle. Such records occasionally appear in general awareness sections of exams because they combine geography, culture, and current events. A particularly tall sandcastle was built and recognised by Guinness in the German city of Duisburg, and this fact is asked to check careful reading of news reports and retention of unique records.

Given Data / Assumptions:

• The question asks for the city where the world's tallest sandcastle was built.
• Options provided are Duisburg, Berlin, Havana, and Paris.
• Guinness World Records recognition is implied in the question.
• This is a pure current affairs and geography based recall question.

Concept / Approach:
The tallest sandcastle recognised by Guinness was constructed in Duisburg, a city in Germany. While Berlin and Paris are more widely known as capital cities and major tourist destinations, Duisburg stands out in this context because of the specific record event. The approach is to recall that the record did not take place in a typical seaside resort location but in an urban setting associated with a sand sculpture festival in Duisburg.

Step-by-Step Solution:
Step 1: Identify that the question refers to the Guinness World Record for tallest sandcastle. Step 2: Recall from news that this record was set in Duisburg, Germany, during a sand sculpture event. Step 3: Examine the options: Duisburg, Berlin, Havana, and Paris. Step 4: Recognise that Berlin and Paris are famous capitals but not connected with this specific record, and Havana is known for other cultural aspects. Step 5: Select Duisburg as the correct answer.

Verification / Alternative check:
To verify, think of the headlines related to this record. Many news sources explicitly mentioned Duisburg and Germany alongside photographs of the sandcastle. If you recall this, and also note that Berlin and Paris usually appear in other contexts such as political and cultural events, not sandcastle records, it becomes easier to confirm that Duisburg is the right choice. Havana, in Cuba, is also not associated with this record, which further strengthens the selection of Duisburg.

Why Other Options Are Wrong:
Berlin: The capital of Germany but not the city where the record breaking sandcastle was built. Havana: Capital of Cuba, known for its history and culture, not for the tallest sandcastle record in the news. Paris: Capital of France, famous for architecture and art, but not related to this sandcastle record. Duisburg: Correct city where the tallest sandcastle recognised by Guinness World Records was constructed.

Common Pitfalls:
Some candidates instinctively choose well known capitals like Berlin or Paris simply because they have heard more about these cities. Others may not recall the exact city and end up guessing incorrectly. The key to avoiding such mistakes is to pay attention to details in current affairs: record events often take place in lesser known cities, and that is exactly why they are interesting. Regular reading of news with focus on surprising locations will help you get such questions right.

Final Answer:
Duisburg is the city where the record breaking tallest sandcastle in the world was built.