BIGGEST

01)               Most populous City in the world---Shanghai

02) Longest Railway Platform---Kharagpur (India),2733 ft.

03) Longest Railroad Tunnel---Seikan
(Japan),33.5 miles

04) Longest Suspension Bridge---Verrazano- Narrows, 13700 ft.long,USA

05) Longest Dam-- Hirakund(India),15.8 miles

06) Highest Dam---Rogusky (U.S.S.R.),1066ft.

07) Largest Dam Kariba---(Rhode
sia),149000000 acre ft.in volume 

08) Longest Road Highway Tunnel---St.Goldhard (Switzerland),10.01 miles

09) Longest Seaway---St.Lawrence seaway (U.S.A.-Canada),189 miles

10) Largest Passenger Ship---Queen Elizabeth II (83000 tonnes)(U.K.)

11) Largest Merchant Ship---Pierre Guillaumat (france),555031DWT Tonnage

12) Largest Diamond Mine---At Kimberly,South Africa