Directions:

Brevik and Stathelle are the main towns from which one can visit the two key sites in the Langesundsfjord area:
Løvøya, the island where thorite was discovered - N59 03.45 E9 44.08.
Låven, the tiny island where mosandrite (source of lanthanum) was discovered - N58 59.73 E9 49.05.