Visiting a city with a great public transportation system, like New York? Leave the car parked, and let us give you some tips on navigating the subway like a pro.

The subway temperatures can be unpredictable, so dress for the weather.

Be considerate -- If you're one of those people who tends to fall asleep in public, make sure you don't end up sleeping on a stranger's shoulder. Get creative!

Remember to stay hydrated.

Be nice to subway cops -- Their job is hard.

If you're visiting, don't be shy about documenting your trip. The subway is a fascinating place, with lots of public art and interesting people.

However, not everyone is approachable, so use your best judgement when snapping pics.

Be mindful of service animals.

In all the hustle and bustle, it can be easy to leave belongings behind. Before you get off, ask yourself, "Do I have everything I came on with?"