How to say at in Spanish

The Spanish word for at is en.
How to pronounce en in Spanish:
Click to hear the pronunciation of en  
Examples of en in Spanish:
En la actualidad trabajo en un banco.
At present, I work at a bank.

Gracias por comprar en...
Thank you for buying at...

No me fijé en el rótulo.
I didn't pay attention to the sign.

Do you know another example that uses at in Spanish? Please tell us where you read or heard it (including the quote, if possible).