Niebüll in the context of "Tønder County"

The Hindenburgdamm or Hindenburg Dam is an 11 km (7 mile) long causeway joining the North Frisian island of Sylt to mainland Schleswig-Holstein. Its coordinates are 54°53′N 8°33′E / 54.883°N 8.550°E / 54.883; 8.550. It was opened on 1 June 1927 and is exclusively a railway corridor. The companies that built the Hindenburgdamm, a job that took four years, were Philipp Holzmann AG of Frankfurt, working from the mainland, and Peter Fix Söhne of Duisburg working from Sylt. A train trip along the causeway takes about 10 minutes, and the time between the auto terminals at Niebüll on the mainland and Westerland on Sylt is about 30 minutes. The Hindenburgdamm is part of the railway line known as the Marschbahn ("Marsh Railway"), which is double-tracked along much of the route, although there as yet exists a single-tracked stretch. On the causeway is a signal box. The rail line is not electrified making the use of diesel locomotives necessary. Trains coming from origins further south like Hamburg change from an electric locomotive to a diesel locomotive at Itzehoe.

Every day, more than 100 trains pass over the causeway, 50 of those ferrying cars (there is no road link to Sylt). Each year, the railway ferries more than 450,000 vehicles over the causeway.

Bökingharde Frisian (Böökinghiirder frasch), also known as Mooring, is a dialect of the North Frisian language spoken in Niebüll and the amt of Bökingharde in the German region of North Frisia. The dialect forms part of the mainland group of North Frisian dialects.

The Mooring subdialects are spoken in the Risum Bog (Risem Moor or Risem Måår). Mooring is often used as a North Frisian lingua franca, especially on the internet, and there is a Mooring Frisian primary school in Risum-Lindholm.