Indulge in the world's most luxurious spa hotels

This hotel overlooks a picturesque lake in the Tiefenbach valley, on the edge of Büllingen village. It features wellness facilities including saunas and an indoor swimming pool.

Hotel Haus Tiefenbach features rooms with a work desk, minibar and TV. Every morning a breakfast buffet is served including croissants, cereals and warm dishes such as bacon and eggs.

Guests can enjoy international cuisine prepared with local ingredients when possible and complimented by wines from the cellar.

To explore the area, guests can rent bicycles on site. The lake in front of the building is ideal to fish for trout.

High Fens-Eifel Nature Park is 6 km from the hotel and the German border is less than 10 minutes away by car.

Set in Lanaken, 5.2 km from Basilica of Saint Servatius, Boutique Hotel Annamaes, Maastricht-Hoge Kempen offers accommodation with a garden, free private parking, a terrace and a restaurant. Featuring a bar, the 4-star hotel has air-conditioned rooms with free WiFi. The property is non-smoking and is situated 5.2 km from Vrijthof.

All guest rooms in the hotel are fitted with a flat-screen TV.

Breakfast is available, and includes buffet, à la carte and continental options.

Guests at Boutique Hotel Annamaes, Maastricht-Hoge Kempen will be able to enjoy activities in and around Lanaken, like cycling.

Maastricht International Golf is 5.4 km from the accommodation, while Kasteel van Rijckholt is 12 km from the property.

Located in Dunkeld, Dunkeld House Hotel is on the riverwalk, a 4-minute drive from Dunkeld Cathedral and 9 minutes from The Hermitage. This upscale hotel is 11.1 mi (17.8 km) from Bells Blair Athol Distillery and 15.4 mi (24.7 km) from Perth Theatre.

Set in Barretaine, 25 km from Lac de Chalain, Maison Zugno Hôtel & Spa offers accommodation with a seasonal outdoor swimming pool, free private parking, a garden and a terrace. With a restaurant, the 5-star hotel has air-conditioned rooms with free WiFi, each with a private bathroom. Guests can use the spa and wellness centre with a sauna, and hot tub, as well as a bar.

At the hotel, every room is equipped with a wardrobe. Maison Zugno Hôtel & Spa provides certain units with mountain views, and every room includes a coffee machine. The units will provide guests with a fridge.

Breakfast is available, and includes à la carte, continental and gluten-free options.

You can play tennis at the accommodation.

Herisson Waterfalls is 33 km from Maison Zugno Hôtel & Spa, while Comté Museum is 4.6 km away. Dole-Jura Airport is 48 km from the property.

A stay at Hotel Kaiserhof places you in the heart of Münster, steps from GOP Variety Theater and 4 minutes by foot from Museum of Lacquer Art. This spa hotel is 0.2 mi (0.4 km) from Münster City Museum and 0.5 mi (0.8 km) from Ludgeriplatz.

Located in Melle, Van Der Valk Hotel Melle - Osnabrück is in the suburbs – a 4-minute drive from Niels-Stensen-Kliniken Christliches Klinikum Melle GmbH and 6 minutes from Automuseum Melle. This family-friendly hotel is 2.4 mi (3.9 km) from TERRA.vita Nature Park and 10.7 mi (17.2 km) from Ravensburg Castle.

When you stay at Doxford Hall Hotel & Spa in Chathill, you'll be in the historical district, within a 15-minute drive of Alnwick Castle and Bamburgh Castle. This spa hotel is 1.4 mi (2.2 km) from Preston Tower and 3.6 mi (5.9 km) from Embleton Tower.

With a stay at Too Hotel Paris - MGallery in Paris (13th Arrondissement), you'll be within a 5-minute drive of Bois de Vincennes and National Library of France. This spa hotel is 1.5 mi (2.4 km) from Bercy Arena and 2.5 mi (4.1 km) from Jardin des Plantes.

When you stay at Imperial Hotel in Llandudno, you'll be on the beach, within a 15-minute drive of Conwy Castle and Eryri National Park. This beach hotel is 0.1 mi (0.1 km) from Promenade and 0.1 mi (0.1 km) from Llandudno ski slope.

With a stay at Van der Valk Hotel Maastricht in Maastricht (Heer), you'll be within a 10-minute drive of Vrijthof and De Geusselt Stadium. This eco-friendly hotel is 1.3 mi (2.1 km) from Bonnefanten Museum and 1.4 mi (2.3 km) from Fair Play Casino Maastricht.

With a stay at Glasgow Argyle Hotel, BW Signature Collection, you'll be centrally located in Glasgow, within a 5-minute drive of OVO Hydro and Scottish Exhibition and Conference Centre. This hotel is 0.6 mi (0.9 km) from Buchanan Street and 3.3 mi (5.3 km) from Hampden Park.

Hotel Zugbrücke Grenzau GmbH offers a 1500 m² wellness area, a table tennis school, and a bowling centre. This family-run hotel is set in the Rhine Westerwald forest, 15 km from Koblenz.

All rooms at the 4-star-superior Zugbrücke Grenzau include a flat-screen TV, minibar, and free Wi-Fi. Each has a private bathroom with bathrobe and hairdryer.

Regional specialities and varied buffets are served in the Restaurant Z. Handmade Neapolitan pizzas and home-brewed beers are also offered. A rich breakfast is also on offer every morning.

WaldRausch Spa & Sport centre includes various saunas, a sun terrace and beauty treatments. Guests can also relax in the CUBE Bar or in the beer garden.

A stay at Best Western Plus Hotel Willingen places you in the heart of Willingen, steps from Muhlenkopf Hill and Diemelsee Nature Park. This family-friendly hotel is 0.4 mi (0.7 km) from Freizeitwelt Willingen and 0.5 mi (0.8 km) from Ettelsberg-Kabinenseilbahn.

With a stay at Hotel Bachaumont, you'll be centrally located in Paris, steps from Rue Montorgueil and within a 10-minute walk of Palais Royal. This spa hotel is 0.6 mi (1 km) from Arts et Metiers Museum and 0.7 mi (1.1 km) from Centre Pompidou.

With a stay at Best Western Plus Hotel Papenburg, you'll be centrally located in Papenburg, within a 10-minute walk of Forum Alte Werft and Maritime World of Experience. This spa hotel is 0.7 mi (1.1 km) from Meyer's Mill and 2.5 mi (4.1 km) from Meyer Werft Visitor Center.

Located in Seligenstadt, Trans World Hotel Columbus is in the suburbs, within a 10-minute drive of Monte Mare Obertshausen and Benediktinerabtei Seligenstadt. This spa hotel is 13.7 mi (22.1 km) from Römerberg and 13.8 mi (22.2 km) from MyZeil.

Located in New Ross, Brandon House Hotel is within a 5-minute drive of Dunbrody Emigrant Ship and St Mary's Abbey. This family-friendly hotel is 4.3 mi (6.9 km) from Kennedy Homestead and 7.6 mi (12.2 km) from John F. Kennedy Arboretum.

Located in Adare, Fitzgerald's Woodlands House Hotel is in a rural location, within a 5-minute drive of Adare Golf Club and Desmond Castle. This family-friendly hotel is 19.9 mi (32 km) from Bunratty Castle and Folk Park and 2 mi (3.2 km) from Old Trinitarian Abbey.

Enjoying an indoor pool, a sauna with mountain views, a spa and wellness centre, Hotel Rimberg is the perfect place for relaxation. Located in Schmallenberg, guests can enjoy a restaurant and a fitness centre, all in a stunning setting in the Rothaar Mountains.

Fully renovated in 2013, the hotel boasts natural stone interiors, and each room features wooden floors, a seating area and a satellite flat-screen TV. The private bathrooms come with a shower or bathtub, bathrobes, free toiletries and a hairdryer.

Breakfast is served daily at the hotel, and guests will find a minibar in their room containing snacks and refreshments, including free mineral water. The restaurant serves regional cuisine and a great view. Schmallenberg centre is a 15-minute drive from the property, there guests will find cafes and restaurants.

With a games room and free bikes at the hotel, there are plenty of activities available. Guests may also try skiing, hiking and golfing in the surrounding area. There is an on-site ski lift. Rothaargebirge Nature Park is just 21 km from the hotel.

Free WiFi and on-site parking are offered. Dortmund Airport is 72 km from Hotel Rimberg.

Hotel Calamus is situated in Kehl am Rhein, 3.4 km from the town centre and 10.5 km from Strasbourg city centre. Hotel Calamus offers on-site dining. The accommodation features a 24-hour front desk.

All guest rooms in the hotel are hypoallergenic and fitted with a flat-screen TV. Featuring a private bathroom with a walk-in shower and free toiletries, rooms at Hotel Calamus also offer free WiFi. Guest rooms at the accommodation include air conditioning and a desk.

The Chattanooga Steakhouse offers grilled specialities, while the restaurant Julia's serves Italian delicacies.

There is also a 1600-square-metre indoor playground for the younger guests.

The property includes the CalaRace electric go-kart racing track and the Chattanooga Sportsbar.

The Bridge of Europe is 3.8 km from Hotel Calamus. Strasbourg International Airport is 26 km from the property.