Quick answer
метро́ (metro), авто́бус (bus), магази́н (shop), апте́ка (pharmacy). To ask the way: Скажи́те, где…?
Getting around
Places
Asking the way
в or на?
в магази́не, в ба́нке, в па́рке — but на по́чте, на ры́нке, на вокза́ле, на у́лице. The на group is a list; these four are the ones you will meet first.
Typical mistakes
Я е́ду в метро́ — meaning “to the metro”
Я иду́ к метро́.
To walk towards it, use к + dative. в метро́ means you are inside it.
Я в по́чте.
Я на по́чте.
The post office belongs to the на group.
Check yourself
How do you ask “Where is the metro?” politely?