To create the lists, online casino Betway ranked each landmark, park and lake, beach and museum in every European country on an index system. Those with a greater percentage of four and five-star reviews across both Tripadvisor and Google ranked higher in the index, which also looks at those with the least amount of reviews on both platforms.

Best for undiscovered adventure - Switzerland’s Fronalpstock mountain ranked as the best hidden gem landmark in Europe, with Latvia being home to the most hidden gem landmarks in the top 20 overall.

Best for undisturbed natural beauty - Andorra and Northern Ireland are home to the most hidden gem parks and lakes in Europe, with Andorra’s Estanys de Montmalus lake coming out on top.

Best for blissful beaches - Scotland and Wales bring the UK into the spotlight for having the best beaches out of any other European country, with Scotland’s Gruinard Bay taking the spotlight for the best hidden gem beach overall.

Best for unearthed culture - Albania and Andorra rank highest in Europe for hidden gem museum hopping.

See below for all the top 20 hidden gem lists in Europe for landmarks, parks and lakes, beaches and museums.

Top 20 European landmarks to visit over the summer

Top of the list, Switzerland’s Fronalpstock mountain ranks as the best hidden gem landmark in Europe. For an unforgettable holiday experience, head to Fronalpstock for a breathtaking mountain range hike with unbeatable 360 degree views of the Schwyzer Alps at the summit.

Overall, Latvia was found to be Europe's hidden gem hotspot for landmarks, making it the perfect place for summer sightseeing. In the top 3 are the mystifying bridge to nowhere, Europe's widest waterfall - Venta Rapid, and Liepaja Northern Forts built in the 19th century; a bit of everything for adventure seekers, water babies and history buffs.

Together, Andorra and Northern Ireland offer the most hidden gem parks and lakes In Europe, with three in each location. Head to Andorra for the beautiful lakes of Estanys de Montmalus and Estanyt Esbalcat, or challenge yourself to a hike around the lush green mountain range of Pic de l'Estanyo.

Northern Ireland’s nature reserves appear to be best kept secrets among locals, with Antrim Coast and Glens Area of Outstanding Natural Beauty, Mourne Mountains Area of Outstanding Natural Beauty, and Lough Beg topping the list of hidden gems.

Top 20 European beaches to visit over the summer

Europe boasts some beautiful beaches, but it seems even the sun and sea of Santorini can’t compete with the hidden gems that the UK has to offer. Overall, Scotland and Wales are home to the most hidden gem beaches in Europe, boasting four beautiful stretches of coastline each.

Ranking as the best hidden gem beach in Europe, Scotland’s Gruinard Bay takes top spot on the list, along with Machir Bay, Saddell Bay and West Beach in Berneray.

In Wales, the best kept secret beaches have been revealed as Westdale Bay, Aberffraw (Traeth Mawr), Porth Wen, and Mewled & Fall Bay.

Top 20 European museums to visit over the summer

If you’re after a culture trip, make your way to Albania for the highest ranking hidden gem museum in Europe - Venice Art Mask Factory, which showcases the exclusive production of baroque hand crafted and luxury Venetian masks

Overall, Andorra boasts the most hidden gem museums in Europe, with four making the list; Museu Casa Rull, Cal Pal Mill, Museo del Comic, and Centre D'interpretacio Andorra.

Methodology

Betway ranked each landmark, park and lake, beach and museum in every European country on an index system. Those with a greater percentage of four and five-star reviews across both Tripadvisor and Google ranked higher in the index, which also looks at those with the least amount of reviews on both platforms.