Earlier this year I took the train up to Jungfraujoch in Switzerland.(the highest train station in Europe)

I mailed several post cards to my friends. The post cards were deposited into the mailbox next to the souvenir shop. Some of my friends on the east coast received them in only 3 business days!!! (mailed on Monday and
delivered on Thursday)

The slowest post card I've received was from my friend who mailed it from Buenos Aires. It took almost 3 weeks to reach me...