Palisade Fence

Top level security: spikes+dense piles+thick steel, extremely difficult to climb/damage, strong deterrence.
Durable and maintenance free: galvanized/sprayed anti-corrosion, 30 years rust free, almost no maintenance required.
Terrain adaptation: Modular design, adjustable with slopes/uneven ground to maintain regularity.
Good visibility: transparent structure, unobstructed monitoring, balancing security and visibility.