If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
One cubic mile of seawater contains about 50 pounds of gold.
79
The Atlantic Ocean is saltier than the Pacific Ocean.
54
Mexico City is built on top of an underground resevoir!
47
The state with the longest coastline in the Continental U.S. is Michigan.
31
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
112
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119