THE world is full of amazing places to go for a dip, but one spot really is a ‘hidden’ gem – as you can swim underneath a castle.
The Château d’Urspelt, in the heart of the Éislek region of Luxembourg, is a luxurious hotel within a former castle.
But below it is the ultimate surprise – a pool designed in the shape of a sunken grotto.
Guests can step into the pools, with different rock-style formations across the walls and ceilings, as well as plants draping down.
And the indulgent experience doesn’t stop there as the spa also has six treatment rooms, a relaxation room, two hammams, two saunas, a whirlpool and a fitness room.
After enjoying the different spa areas, guests can put their feet up and relax with a cup of tea in the tea room.
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Access to the wellness area costs €60 (£52.36) per person, or it is free when you book a massage or treatment.
As for the castle-turned hotel, which opened back in 2008, the rooms are equally as decadent as the spa experience.
There are a variety of different room types to choose from, with 57 rooms and suites.
Continuing with the theme of grandeur, in the castle’s historic cellars – which were dug out by hand from the original basement – is the U Lounge Bar.
When workers were digging out the basement, they also discovered a well, which has since been exposed.
The bar serves a range of drinks including spirits, wines and cocktails.
Alternatively, guests can head to The Library for a cosy and inviting atmosphere.
In the morning, guests are invited to head behind the reception desk to reach a sprawling buffet breakfast, with homemade jams, freshly baked cakes and honey produced by bees on site.
The outdoor pool, which overlooks the entire estate, even has its own bar, serving up refreshing drinks and light snacks.
In the warmer weather, guests can enjoy the indoor-outdoor Patio or for a more refined experience, The Dining Room.
Otherwise the château is also home to an orchard, three running and walking routes and even electric scooters for hire.
Rooms at the hotel cost from around £147 per night and the hotel is located around an hour from Luxembourg Airport.
Travellers looking to explore the surrounding area won’t be short of options either, as the château is close to many charming towns.
For example, 30km away from the château is Vianden Castle, which was built between the 11th and 14th centuries.
In fact, it was named as one of the 20 most beautiful castles in the world, by CNN Travel.
And each year the castle hosts a medieval festival in August, with duelling knights and jugglers.
There’s also a UK castle that costs less than a hotel stay in London with an indoor swimming pool, tropical gardens and a private beach.
Plus, you can stay at a fairytale English castle once home to famous king – with tower suites and the UK’s largest four-poster bed.