<p>Tim Marshall profiles Maastricht, the city where 30 years ago the European Union was born. Have these economic measures dented relations between the communities that sit on one of Europe’s linguistic and cultural fault lines?</p><p>(Photo: Aerial view of the city of Maastricht. Credit: N. Bellegarde/Getty Images)</p>

On the Border: Niagara Falls

Surprising stories from unusual places. With ideas too big for a single episode, The Compass presents mini-series about the environment and politics, culture and society.