Although it is possible to learn a foreign language with little or no reference to the culture of the people who speak it, the experience is far more rewarding if you go beyond grammar and vocabulary and gain an understanding of the cultural aspects too. Below you will find some resources that will help you to do that for the two main English-speaking countries, as well as some links to sites giving information about cultural etiquette in virtually any country.
Anglophenia — BBC America YouTube channel explaining UK culture for Americans.
British Council ESOL Nexus — Learn more about different places in the UK, its culture, history and law.
British Culture — YouTube channel with 68 videos about British culture.
British Culture — Customs, Culture and Traditions (LEO Network) — These articles for advanced learners explore some lesser-known areas of British culture.
Culture UK — Find out more about true Brits; past and present, myth and legend, fact and fiction.
Exploring English: Language and Culture — This free MOOC for learners of English looks at British culture and examines English in use to help you improve your language skills.
Project Britain — This site, which began as a school project, now has over 30,000 pages on British life and culture.
UK Culture — Find out all about contemporary culture in the UK in this British Councli video and audio series for intermediate and advanced learners.
10 Things to Know about U.S. Culture — Things to keep in mind about Americans and U.S. culture before you arrive.
101 Characteristics of Americans/American Culture — 8-page PDF.
96 Differences Between American And British Culture (Huffington Post)
About the U.S.A. — 135-page PDF American Studies reader that examines the customs, government, and history of the US.
British Vs American English: 100+ Differences Illustrated
Celebrate! Holidays in the U.S.A. —This book discusses the ten federally-recognized holidays in the United States, as well as many celebratory days. Download as an e-book or as individual PDF chapters.
Country Insights — Canadian government site with detailed cultural information on virtually every country in the world.
Culture Crossing Guides — A community-built resource for cross-cultural etiquette and understanding.
Executive Planet — Provides valuable tips on business etiquette, customs and protocol for doing business worldwide.
International Business Etiquette, Manners, & Culture — A mine of information.
Kwintessential Country Guides — These guides cover everything from etiquette, to local customs, culture and how to conduct business.