Block lattice-based cryptocurrency NANO, formerly known as RaiBlocks, has teamed up with the “UK’s first dedicated cryptocurrency exchange,” London Block Exchange for a cryptocurrency scavenger hunt. The promotion is being run to celebrate and advertise NANO being listed on the exchange.

The scavenger hunt takes place in London, and participants will have to solve cryptic riddles in order to find locations that offer clues to piece together a password to unlock a prize: a Ledger Nano S pre-loaded with £5,000 (approximately $5,725 equivalent).

London Block Exchange has offered the following instructions:

“London Block Exchange will release a series of FIVE cryptic riddles across various media channels over the next few weeks. The clues will hint at a special location in London and to win you’ll need to solve them and work out the winning password – which is written at the secret location. Clues have been deliberately constructed to have hidden/double meanings and every riddle has been carefully designed to become progressively easier to solve… so read them very carefully!”

Whoever is able to solve the riddle must write the password on a piece of paper, and below the password the phrase “NANO/GBP only at LBX.com” must be included. London Block Exchange then wants a selfie taken with the piece of paper, and the photo must be tweeted to @LBXSocial using the hashtag #RealCryptoHunt.

The promotion is the first of its kind, and a great way for NANO to get some positive publicity. Cryptocurrency has been the subject of negative press throughout much of 2018, as it was the focal point of the BitGrail scandal, which resulted in $150 million worth of NANO (at the time) stolen from investors. NANO is currently trading at $1.31, after falling from its January all-time high of $34 according to CoinMarketCap data.