Location: Treasure Chest
Depth: 210
Depth: 210
Answer: DRESDEN
There were 72 coins in the chest of 16 unique designs. They looked like this:
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Each coin design had a number and a currency code stamped on the front (obverse), and a map on the back (reverse). The maps depicted cities in the country indicated by the currency code. Pair the coins by the number of that coin found in the chest; each pair also shares a denomination. Index the denomination into the alphabet and order by the number of coins found in the chest to spell GEODESIC.
Plot the cities on the world map, and draw geodesic arcs between the pairs. You'll find four intersections on the map. Take the four intersection points, and again draw geodesic arcs between pairs. The final intersection will be over the city Dresden, Germany. DRESDEN is the answer.
| Obverse | Reverse | Currency Code | Number in the Chest | Denomination | Country | City |
|---|---|---|---|---|---|---|
 |  | GNF | 1 | 7 | Guinea | Conakry |
 |  | SAR | 1 | 7 | Saudi Arabia | Riyadh |
 |  | ARS | 2 | 5 | Argentina | Buenos Aires |
 |  | USD | 2 | 5 | United States | Montpelier, VT |
 |  | IRR | 3 | 15 | Iran | Tehran |
 |  | RUB | 3 | 15 | Russia | Irkutsk |
 |  | PKR | 4 | 4 | Pakistan | Lahore |
 |  | RUB | 4 | 4 | Russia | Moscow |
 |  | COP | 5 | 5 | Colombia | Bogota |
 |  | SRD | 5 | 5 | Suriname | Paramaribo |
 |  | LVL | 6 | 19 | Latvia | Riga |
 |  | NOK | 6 | 19 | Norway | Trondheim |
 |  | PTE | 7 | 9 | Portugal | Lisbon |
 |  | ZAR | 7 | 9 | South Africa | Newcastle |
 |  | FIM | 8 | 3 | Finland | Pori |
 |  | SEK | 8 | 3 | Sweden | Orebro |
