[Answer] 1. We start our tour in Romania, where Europe's second longest river empties in the Black Sea. Which river is this?

Step 1 : Introduction to the question "1. We start our tour in Romania, where Europe's second longest river empties in the Black Sea. Which river is this?"

...1. Volga 2. Danube 3. Dnieper 4. Dniester The Danube originates in the Black Forest region in Germany and flows to the Black Sea over a length of 2,860 km (1,780 mi). After it leaves Germany, it flows through or forms the border with Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova and Ukraine. Most of its delta lies in Romania, although the northern part is part of Ukraine. The Volga is the longest river in Europe (3,692 km/2,294 mi). It empties in the Caspian Sea. The Dnieper (2,290 km/1,420 mi) and Dniester (1,362 km/846 mi) are two other rivers that empty in the Black Sea.

[Ans] Europe's largest annual hot air balloon festival is held is this city?

Step 1 : Introduction to the question "Europe's largest annual hot air balloon festival is held is this city?"

...The European Balloon Festival is the largest hot air balloon festival in Spain, and one of the largest in Europe. It takes place every year during the first fortnight of July in Igualada, Catalonia, Spain, a city located within 60 km from Barcelona. The festival lasts four days (Thursday to Sunday) and attracts thousands of spectators. It includes a hot air balloon competition and recreational exhibitions such as a night glow and fireworks. The flights take place early in the morning and late in the afternoon, when weather conditions are the optimal ones. It also offers visitors the opportunity to fly on a balloon, by booking a flight in advance.

[Ans] In what country is Europe's only desert located?

Step 1 : Introduction to the question "In 1959, NASA launched a rocket into space containing two of what kind of animal? "

The Błędów Desert was not created naturally, but rather as a result of human activity which lowered the water table to such a degree that the ground could no longer support plant life. Beginning in the Middle Ages, area forests were aggressively cleared to meet the needs of local mining and metal working endeavors. This clearcutting exposed approx.

Step 2 : Answer to the question "In 1959, NASA launched a rocket into space containing two of what kind of animal? "

Poland: Błędów Desert is an area of sands between Błędów  and the villages of Chechło and Klucze in Poland. 

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