The Sierra Nevada mountains.
The biggest obstacle to utilizing the natural resources of Central Asia is that most of the countries are landlocked. Azerbaijan is the gateway country to Central Asia since it has ports and it is emerging as an important exporter of oil and gas.
Eastern,Central,Mountain,Pacific
Along the Pacific coast and in central-eastern Mexico.
On May 10 , 1869 the track of the Union Pacific and Central Pacific met a Promontory Point , Utah Territory.
Grasslands.
Mountaineous Core, Caribbean Lowlands, and Pacific Coastal Plain
How to cross river with elephants... was I guess the first major obstacle the Hannibal army faced...
forget about it
no i cant its to hard sorry:(
unequal standards of living
austria