how Thalys sell their high speed train services

Thalys is an international high-speed train operator that runs services between Paris, Brussels, Amsterdam and Cologne.

And by the look of things they like to promote them a little differently.

They recently wanted a fresh way to present their train destinations - something a little away from the norm - something a little creative. So they came up with the idea of capturing the sound identities of Paris, Brussels and Amsterdam and integrated them into three outdoor installations, with each city represented by over 1000 sounds. Each sound was heard through its own unique headphone jack. 

The sounds included overheard conversations, street musicians, language lessons, market sellers, church bells, and archive sounds resulting from a partnership with the French National Audio-visual Archives.

This little video shows it's pretty impressive stuff in both idea and execution.