This $20,000 Ritani platinum engagement ring is the grand prize...

This $20,000 Ritani platinum engagement ring is the grand prize in the third annual Race for the Platinum Ring in Glen Cove on June 9. Credit: Handout

Trade pirates for sneaker-clad couples, maps for smartphones and chests of gold for a $20,000 platinum engagement ring, and what do you get?

A modern day treasure hunt, also known as the third annual Race for the Platinum Ring in Glen Cove.

Just to make shopping for an engagement ring that much more exciting (not to mention affordable), Two by London, the engagement shop at London Jewelers in Americana Manhasset, is giving one lucky couple the chance to win a Ritani sparkler.

Want to see what you're competing for? The ring is on display at the store, 2032 Northern Blvd., Manhasset. (It's also pictured above.)

To sign up, couples must submit their love stories at racefortheplatinumring.com.

Participants will meet in downtown Glen Cove at 10 a.m. on June 9. In teams of two, they will use their mobile phones to complete challenges and solve riddles in locations throughout Glen Cove. The team with the most points at 1 p.m. wins the grand prize . . . and a great story to tell their grandkids one day.

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