Locallingual is an interactive map of languages and dialects around the world. You can click on the map to read the language(s) spoken within a country, province, state, or city. You can then click on the listed language(s) to hear words and phrases spoken by people who live in that area. It's a neat way to discover the differences in how a language is spoken from one region to the next.
Applications for Education
Locallingual is a crowd-sourced project which means there are audio contributions from all kinds of people. Rather than directing your students to explore the site on their own, I would select some specific examples and play them for my students. In other words, you'll want to moderate what is played in your classroom. I listened to about a dozen recordings today and heard one recording that I definitely would not play in my classroom.
H/T to Maps Mania for the Locallingual link.