There is a Netent network promotion called "World of Wonders". I don't know how many accredited casinos take part. So far I only saw it at Guts and at a rogue one.
The winner gets to travel in 7 countries and visit the 7 Wonders of the World.
"26th April – 6th May 2018: Netent – World of Wonders
Play any Netent Game until 6th May 2018 and earn 1 ticket to the prize draw for every €200 wagered. On 7th May 2018, Netent will draw one winning ticket from all eligible entries and will announce the winner on 8th May 2018. No cash alternative is available. This is a Netent network wide promotion and the winner can be from any of the participating casinos.
The lucky winner will get to enjoy a 27-days trip around the world to visit the newly crowned seven World Wonders. The prize includes: Around-the-World Business Class tickets, departing from an European city | Luxury 4 & 5-star accommodations in each city with breakfast | Airport chauffeur and return private airport transfers at each destination | A private tour of each of the 7 Wonders | Cost for Travel Visas | Michelin or equivalent Restaurant meal in each city | Hotel dinner in each city."
The winner gets to travel in 7 countries and visit the 7 Wonders of the World.
"26th April – 6th May 2018: Netent – World of Wonders
Play any Netent Game until 6th May 2018 and earn 1 ticket to the prize draw for every €200 wagered. On 7th May 2018, Netent will draw one winning ticket from all eligible entries and will announce the winner on 8th May 2018. No cash alternative is available. This is a Netent network wide promotion and the winner can be from any of the participating casinos.
The lucky winner will get to enjoy a 27-days trip around the world to visit the newly crowned seven World Wonders. The prize includes: Around-the-World Business Class tickets, departing from an European city | Luxury 4 & 5-star accommodations in each city with breakfast | Airport chauffeur and return private airport transfers at each destination | A private tour of each of the 7 Wonders | Cost for Travel Visas | Michelin or equivalent Restaurant meal in each city | Hotel dinner in each city."