Names of places.
a.

Cities, rivers, oceans, lakes, mountains, etc.
_Chicago_ _Mississippi River_ _Atlantic Ocean_ _Lake Superior_ _Pike's Peak_ _Strawberry Hill_.
Note that the generic terms ocean, lake, mountain and the like are capitalized only when they are an actual part of the name itself.

We would say "_The Atlantic Ocean lies east of the United States_," but we would say "_The states which form the North American republic look out on two great oceans, the Atlantic and the Pacific._" The following tables are taken from _A Manual for Writers_ by John Matthews Manley and John Arthur Powell (University of Chicago Press, Chicago).
Subject to the rule just stated, they will be found very useful.
Capitalize, in singular form only, when immediately following the name Archipelago Borough Branch (stream) Butte Canyon County Crater Creek Delta Forest Fork Gap Glacier Gulch Harbor Head Hollow Mesa Narrows Ocean Parish (La.) Park Plateau Range Reservation Ridge River Run Capitalize in singular or plural form when immediately following the name Hill Island Mountain Spring Capitalize, in singular form, either before or after the name; and in plural form before the name Bay Bayou Camp (military) Cape Dalles Desert Falls Fort Isle Lake Mount Oasis Pass Peak Point Port Sea Strait Valley Volcano b.

Names of streets, squares, parks, buildings, etc.
_Amsterdam Avenue_ _Van Buren Street_ _Independence Square_ _Lincoln Park_ _Transportation Building_.
The same rule as to capitalization of the generic name holds here as in the preceding section.

The usual tendency to drop capitals is at work here and newspapers now write _Washington street_ and _Federal building_.