Learn French: Je vais à la gare à pied. - I go to the train station on foot.

Aller (to go) and venir (to come) are often reviewed together because they are opposites. Here, you are moving away from your current location to get to the station, so you use vais (I go). If someone was waiting for you at the station and you were heading toward them, you would use venir and say Je viens à la gare (I am coming to the station).

Why does the word à mean "to" in the first half of the sentence, but "on" in the second half?

The French preposition à is very versatile and doesn't have just one English translation. While it often means "to" or "at" for locations (like à la gare for "to the station"), it is also used to build set phrases that describe how you do something, such as your method of travel.

Why is it à la gare and not just à gare?

In French, you almost always need an article (like "the" or "a") before a noun. Gare is a feminine noun, so it takes the feminine word for "the", which is la. Unlike the masculine version à le (which must combine into the single word au), à la always stays as two separate words.

Why isn't there an article before pied? Shouldn't it be à le pied or au pied?