Valley of the Seven Castles

Mersch is a canton in the centre of Luxembourg. It is the only canton, other than Luxembourg, to be entirely surrounded by other cantons, and therefore not to have an international boundary. Its capital is Mersch.

Schoenfels (Luxembourgish: Schëndels) is a village in the commune of Mersch, in central Luxembourg. As of 2005, the village has a population of 208. It is the location of Junction 3 of the A7 motorway, which goes from Luxembourg City to Clervaux.

Schoenfels Castle (Luxembourgish: Schlass Schëndels; French: Château de Schoenfels), with a history dating back to the 12th century, is one of the castles belonging to the Valley of the Seven Castles in central Luxembourg. Located in the village of Schoenfels in the Mamer Valley between Kopstal and Mersch, it now belongs to the State of Luxembourg.

The Gousselerbierg Tunnel is a pair of parallel road tunnels in the canton of Mersch, in central Luxembourg. The tunnels are named for the hill through which they pass, near the town of Gosseldange, in the commune of Lintgen. At 2,695 metres (8,842 ft), the Gousselerbierg Tunnel is the second-longest tunnel in the country, after the Grouft Tunnel, at 2,950 metres (9,678 ft).The tunnel carries the A7 motorway, and is the first of three major tunnels on the route of the road, together with the Grouft Tunnel and the Stafelter Tunnel (1,850 m). Each of the twin tunnels contains two lanes of traffic in one direction. At its maximum, the tunnel lies 115 metres (377 ft) below the surface of the hill.The tunnel was constructed using the New Austrian Tunnelling method, relying on the stress of the surrounding rock to stabilise the tunnel. Preparatory work on the tunnel began on 17 April 2000, and drilling work began on 21 November of the same year. The breakthrough ceremony was held on 12 December 2002, with Grand Duke Henri detonating the explosive charge that connected the two ends of the tunnels. Altogether, the tunnel cost €100m to construct, and 420,000 m³ (14.8m cu ft) of earth were excavated, 65% of which was removed by explosives.

Lintgen railway station (Luxembourgish: Gare Lëntgen, French: Gare de Lintgen, German: Bahnhof Lintgen) is a railway station serving Lintgen, in central Luxembourg. It is operated by Chemins de Fer Luxembourgeois, the state-owned railway company. The station is situated on Line 10, which connects Luxembourg City to the centre and north of the country.

Keispelt (Luxembourgish: Keespelt) is a small town in the commune of Kehlen, in central Luxembourg. As of 2005, the town has a population of 555.

Hunsdorf (Luxembourgish: Hënsdref) is a small town in the commune of Lorentzweiler, in central Luxembourg. As of 2005, the town has a population of 397.

Steinsel (Luxembourgish: Steesel [ˈʃteːzəl] ) is a commune and town in central Luxembourg. It is located north of Luxembourg City. As of 2005, the town of Steinsel, which lies in the west of the commune, has a population of 1,844. Other towns within the commune include Heisdorf and Mullendorf. Like most of Luxembourg, Steinsel has an oceanic climate. On 25 July 2019, Steinsel recorded a temperature of 40.8 °C (105.4 °F), which is the highest temperature to have ever been recorded in Luxembourg.

Lintgen (Luxembourgish: Lëntgen) is a commune and small town in central Luxembourg, in the canton of Mersch. It is situated on the river Alzette. As of 2005, the town of Lintgen, which lies in the west of the commune, has a population of 1,686. The number of inhabitants keeps on increasing, therefore ten years later, in 2015 there are approximately 2,798 people living in Lintgen. Another town within the commune is Gosseldange.

Gosseldange (Luxembourgish: Gousseldeng, German: Gosseldingen) is a small town in the commune of Lintgen, in central Luxembourg. As of 2001, the town has a population of 442. Near to the town of Gosseldange is the Gousselerbierg, under which passes the Gousselerbierg Tunnel, the second-longest tunnel in Luxembourg.

Meispelt (Luxembourgish: Meespelt or Meester) is a small town in the commune of Kehlen, in western Luxembourg. As of 2023, the town had a population of 341.

Mullendorf (Luxembourgish: Mëllerëf, German: Müllendorf) is a town in the commune of Steinsel, in central Luxembourg. As of 2005, the town has a population of 1,005.