.
1. Tallest Animal :- Giraffe
2. Fastest Bird :- Swift
3. Largest Bird :- Ostrich
4. Smallest Bird :- Humming Bird
5. Longest Railway Bridge :- Huey P. Long Bridge, Lousiana (USA)
6. Tallest Building :- Burj Tower, Dubai
7. Longest Canal :- Suez Canal
8. Biggest City (Area) :- Mount Isa (Australia)
9. Largest City (Population) :- Tokyo, followed by Shanghai, New York, Beijing, London
10. Costiliest City :- Tokyo
11. Highest City :- Van Chuan (China)
12. Largest Desert :- Sahara (Africa)
13. Largest Dam :- Three Gorges Dam (China)
14. Highest Dam :- Hoover Dam (USA)
15. Largest Island :- Greenland
