Prepositions of Place:
at, in, on

In general, we use:

• at for a POINT
• in for an ENCLOSED SPACE
• on for a SURFACE

Look at these examples:

• Jane is waiting for you at the bus stop.
• The shop is at the end of the street.
• My plane stopped at Dubai and Hanoi and arrived in Bangkok two hours late.
• When will you arrive at the office?
• Do you work in an office?
• I have a meeting in New York.
• Do you live in Japan?
• Jupiter is in the Solar System.
• The author's name is on the cover of the book.
• There are no prices on this menu.
• You are standing on my foot.
• There was a "no smoking" sign on the wall.
• I live on the 7th floor at 21 Oxford Street in London.

Notice the use of the prepositions of place at, in and on in these standard expressions:

See also Prepositions of Time: at, in, on