That's right
There are two types of articles in English: the and a / an.
Articles "a" and "an" indicate that this word denotes any member of a particular group. "A / an" articles are used only with the countable nouns. “A” we use before the noun in the singular, which begins with the consonant, for example: a boy; a car; a bike; a dog. “An” is used with nouns in the singular, beginning with a vowel, for example: an elephant; an egg; an apple; an idiot.
The article “the” indicates that this word denotes a specific member of a particular group. This article can be used as before, as well as before as innumerable, as in the singular, so and in the plural. Here are the rules that will help to properly use the article "the" with geographical objects:
The names of most countries are written without the article: Italy, China, Russia, etc.
Country-exceptions with the article the: the Netherlands, the United States, the Dominican Republic.
Separate mountain peaks and lakes are written without the article: Lake Tahoe, Mountain Fuji, and others.
The names of mountain chains with the article the ： the Rockies The names of the oceans and rivers are written with the article the: the Nile, the Pacific
Examples
I would like to go see a
I just saw the best Broadway show of the year.
I need a new I want the new IPhone.