Free walking adventure · Gate Seal
The Three Keys of the Ancient City
Ages 6+ with an adult · about 20–35 minutes · 3 clues · all outdoors and free. Start at the Old City Gates at the north end of St. George Street.
1
The doorway without a door
Old City Gates
Old City Gates
2
The sea inside the stone
Castillo de San Marcos, viewed from outside
Castillo de San Marcos, viewed from outside
3
The key nobody can buy
Same spot
Same spot
Clues appear one at a time on your phone, with hints, a sketch pad, three optional deeper missions and a full ending. Your progress is saved on your phone, so you can stop for ice cream and pick up where you left off.
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