In case you're not familiar with the Turnip, it's a whimsical Google search, wherein I type a random phrase and we see what kind of interesting pages "turn-up." As always with this feature, the _floss is not responsible for accuracy. If you know one of the below statements/links to be untrue, by all means, let the world know in the comments below.
Today I typed "the widest" into Google, unearthing the following:
Turnip #1 With an internal diameter of 13.7 m the tunnel under the river Yangzi in Shanghai is the widest in the world. Connecting Shanghai to the Changxing island, the tunnel is 16.63 km long.
Turnip #2 The widest tornado (defined as damage path, not condensation/debris cloud or radar measurements) on record is the Wilber - Hallam, Nebraska tornado during the outbreak of May 22, 2004, with a width of 2.5 miles (4 km) at its peak.
Turnip #3 Nine lanes wide, with gardened medians between the opposing flow of traffic, [in downtown Buenos Aires 9 de Julio] is the widest street in the world.
Turnip #4 The Amazon is the widest river in the world. Many kilometers from its mouth it can be as wide as 11 kilometers, and 40 kilometers in the wet season.
Turnip #5 Where is the widest part of the Blue Ridge? Beginning with a narrow ridge in the north, c.10 mi (16 km) wide, the range broadens toward the south, reaching a maximum width of 70 mi (113 km) in North Carolina.
Turnip #6 MONSTERS VS. ALIENS is the widest non-summer release ever with over 7,000 screens.
Turnip #7 Phapheng falls, is said to be the widest waterfall in Asia.
Turnip #8 Neptune is the widest planet in the solar system.