Valkenburg NL

• In the Province of LIMBURG

Valkenburg aan de Geul (Valkenburg on the Geul River)

Oud Valkenburg (Old Valkenburg)

Both are in the this southeast province of the Netherlands, near Maastricht.  * New Netherlands immigrant Lambert Van Valckenburgh was from a LIMBURG family.

See VVV (Tourism Board) South Limburg and Kasteel Valkenburg 

• In the Province of ZUID-HOLLAND

There is also Valkenburg, Zuid-Holland (Valkenburg South Holland) on the Rijn River not too far from Leiden, which is noted for having a big Royal Navy - NATO airbase and which had a large archeaological dig of ancient Roman hill-forts during the 1980s.