Cities: Skylines - Deluxe Edition Upgrade Pack

Included in the Deluxe Edition Upgrade Pack are 5 In-game historical monuments from around the world, the games original soundtrack as well as a digital art book.
Five in-game items include:
Statue of Liberty
Eiffel Tower
Brandenburg Gate
Arc de Triomphe
Grand central terminal
Original Soundtrack:
This Original Soundtrack includes 14 unique tracks mixed from the ambient music of the game, allowing you to enjoy the wonderful music whenever you want.
Digital Art book:
See the concepts behind the buildings! The book features almost a 32 hand-drawn concepts of the game various buildings and the story behind each.