Stadium Love

Stadium Love was a virtual representation of one of Kassandra's genetic memories, relived by Layla Hassan through the portable Animus HR-8.5.

Riddle
''To celebrate their win, champions escort their lovers from the stadium east of Thebes to a bridge a overlooking a lake shaped like a heart. You can find me beside a helmet that was left behind.''

Outcome
Kassandra found and recovered the treasure.

Reference

 * Assassin's Creed: Odyssey