Requirements: These chests will be received by players level 15+

Main reward is the Old Water Tower (3,850 coins, 2-4 energy, 1-3 glass baubles every 22 hours, size 6×7, can be placed anywhere).

Each chest can be opened for 9 Ice keys.

 
There are 3 ways to get Keys:

1. Complete the quests:

Treasure Hunting I (3 keys)
Collect 25 Levers (Textile Factory – all, Upgraded Textile Factory – Wool, Felt, Cashmere)
Collect 25 Sheets of Metal (Construction Factory – when producing Roof)
Collect 15 Trowels (Subway Station, Upgraded Subway Station)

Treasure Hunting II (3 keys)
Collect 40 Bandages (German House, Upgraded German House)
Collect 24 Maps of the stars (Stationery Shop, Upgraded Stationery Shop)
Ask friends for 9 Cords

Treasure Hunting III (4 keys)
Collect 45 Runes (Family House)
Collect 18 Scrolls. Drops randomly (Mansion)
Collect 8 Magic 8-Balls (Pool Parlour, Upgraded Pool Parlour)
 
2. Collect profits from the following buildings:

Supertanic Liner (1 key every 24 hours);
Sweet Store (1 key every 16 hours);
Thean Hou Temple (2-3 keys every 22 hours);
Wightwick Manor (2-3 keys every 22 hours);
Pennsylvania Academy of Arts (1-4 keys every 22 hours);
Basilica of the Sacred Heart (2-3 keys every 20 hours).
 
3. Use the sale offer!