Requirements: the chests will be received by players level 15+
The main reward is Vajdahunyad Castle (4,800 coins, 3-5 energy, 3-5 pearls/candies every 20 hours, size 9*8, can be placed anywhere except the snowy plateau)

Each chest can be opened for 9 Summer keys.
There are 3 ways to get Keys:
1. Complete the quests:

Step 1  (2 summer keys) 
Collect 15 Invitations (Stationary shop and Upgraded one)
Collect 18 Ties (Textile Factory, Improved Textile Factory - Silk)
Collect 17 Diamonds (Mansion)

Step 2 (3 summer keys) 
Collect 33 Bows (Flower kiosk and Upgraded one)
Collect 35 Love Letters (Colonial house and Upgraded one)
Collect 12 Inks (School and Valley School - 3 items each time)

Step 3 ( 4 summer keys )
Ask friends for 9 Diadems
Collect 29 Feather dusters (Shoe shop and Upgraded one)
Collect 15 Satin flowers (Premium cottage) 

2. Collect profits from the following buildings:

The Lighthouse - 1 key every 24 hours
Astronaut Training Facilities - 1 key every 5 hours
Palace of Fine Arts - 2-4 keys every 18 hours
Corus Hotel - 3-5 keys every 18 hours
The Round Church - 1-3 keys every 16 hours
Reichsburg Castle - 3-5 every 20 hours
Art Museum - 3-5 keys every 18 hours
Basilica of the Immaculate Conception - 2-4 keys every 16 hours 3.

3. Use the sale offer!

Special Offer:


Palace of Fine Arts: 3,800 coins, 2-4 energy, 2-3 pearls, 2-4 summer keys during the Vajdahunyad Castle chest event every 18 hours;

Corus Hotel: 2,500 coins, 2,500 piastres, 2-4 energy, 3-5 summer keys during the Vajdahunyad Castle chest event every 18 hours, can’t be sped up by friends;

The Round Church: 3,400 coins, 2-4 energy, 1-3 pearls, 1-3 summer keys during the Vajdahunyad Castle chest event every 16 hours;

Reichsburg Castle: 4,100 coins, 3-5 energy, 2-4 pearls, 3-5 summer keys during the Vajdahunyad Castle chest event every 20 hours;

Art Museum: 3,800 coins, 3-5 pearls/candies, 2-4 energy, 3-4 summer keys during the Vajdahunyad Castle chest event every 20 hours;

Basilica of the Immaculate Conception: 3,400 coins, 2-4 energy, 1-3 pearls, 2-4 summer keys during the Vajdahunyad Castle chest event every 16 hours.