Direct link to promotion page (page is German, so you may need to use google translate)
Type of promotion: Earn free night
Why is this a good deal?
If you are planning a trip to Europe this summer, IHG has a great promotion for you. Book a 4 night stay and pay for only 3 nights! Always compare prices against major OTA's (Expedia, Cheaptickets, etc) and check out their coupons before you book!