Europe's 'best hidden gem' is underrated city with 'most beautiful castle' and huge lake

The data has been scraped, the numbers have been crunched, and the results are in.

Tomar in Portugal has been named Europe’s best-kept secret, and therefore the perfect place for an off-the-beaten-track holiday. If you’re keen to ditch the tourist traps, then HomeToGo’s Hidden Gem Index is a good guide.

Its ranking is based on a mountain of data including accommodation cost statistics, search trends, and insights about food, scenery, and opportunities for adventure. Its off-the-beaten-path treasures include sun-soaked coastlines and breathtaking landscapes.

That is certainly the case for Tomar, a Portuguese town of 20,000 that sits slap in the middle of the country. It may not deliver the simple seaside charm of some of the country’s better-known holiday hotspots, such as those in the Algarve, but it has plenty else to offer.

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For one, it is a town of significant historical importance, replete with all of the architectural treasures and cobblestones you’d therefore expect.

Tomar was built inside the walls of the Convento de Cristo, constructed under the orders of Gualdim de Pais, the fourth Grand Master of the Knights Templar in Portugal in the late 12th century. It was the last Templar town to be commissioned for construction and one of Portugal’s historical jewels in the way it links the modern day back to a now ancient-feeling part of European culture.

Its relevance on an international level continued until the 15th century when it served as a centre of Portuguese global expansion under Henry the Navigator.

The riches that brought at that time are still visible today, especially in Tomar’s cross-shaped medieval centre. There you will find the town’s main church, dedicated to St. John the Baptist, and traditional shops lined with pleasant stores. In Tomar’s cafés, the delights of the local pastries can be appreciated: almond and squash queijadas (cheesecakes) and the traditional Fatias de Tomar (Tomar slices), made with just egg yolks and cooked in a bain-marie.

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Flame fans will want to visit the Convent of São Francisco, which is home to Museu dos Fósforos or the Match Museum.

Given that Portugal regularly hits the mid-30s during the summer months and is currently suffering from wildfires, a location to cool off is key. Happily, Tomar has the Castelo de Bode, one of the largest reservoirs in the country.

There you can go on a pleasant cruise with lunch on board, or choose from a wide range of water sports, as well as visit the islet on the River Tagus where Almourol Castle is located, or the riverside town of Dornes.

A break from the cultural beat can be found at Mouchão Park, home of the Mouchão Wheel. The wooden water wheel is a landmark of the city and evokes the time when mills, oil presses, and farmland along the river all contributed to Tomar’s economic prosperity.

"The Castle of Almourol is regarded as Portugal’s most beautiful castle. Situated on a small cliffy island in the middle of the Tagus River, Almourol Castle is one of the most significant military Medieval monuments, which best evokes the memory of the Knights Templar in Portugal," the Visit Centre of Portugal writes.

"Situated on the left bank of Tagus River, the Natural Reserve of Paul do Boquilobo follows a section of Almonda River born in the Mountain of Serra de Aire e Candeeiros that flows to the right bank of Tagus."

Tomar is roughly a two-hour drive north of Lisbon, or a one hour train ride which costs £10. EasyJet, Tap Air Portugal, British Airways and Ryanair flies directly from London to Lisbon. There are 23 Ryanair direct flights from London to Lisbon per week. Flights are available every day.