black and white image of the hoge fronten high frontspark in maastricht an 18th century fortification area

18th ancient arch architecture area background beautiful been building castle century countryside culture defense environment europe famous fortification fortress fronten frontspark garden green have heritage high hill historic historical history hoge home impressive lamber landmark landscape maastricht medieval monument nature old outdoor park people recently remains restored ruins sky stone summer tourism tourist tower travel tree tunnel view wall werreke which wood works