Footage

Drifting ice reveals a concrete bunker on a small islet in winter

Orbit around a bunker with harbour beacon amid pack ice in winter

Top-down over frozen water towards a bunker on a rocky islet

Flight over a bunker with harbour light at sunrise in frost

Bunker with harbour light on a dike head among ice floes

Cargo ships moored in a frozen harbour with ice floes

Flyover above German bunkers in the dunes near IJmuiden

IJmuiden

Flight over a dike towards a harbour with colourful houses

Flight over dike slopes to a concrete inlet structure near Westervoort

Westervoort

Small lighthouse on snowy Stavoren harbour pier at golden hour

Stavoren

Flight under the Elfstedenmonument over a frozen waterway in snow

Flyover past an excavator by a reed bank and dike houses in winter

Flyover of a residential area with canals and a city on the horizon

Flyover along a reedy lakeshore and flooded meadows in mist

Flight over meandering creeks in a marsh nature area against low sun

Flight along a partly frozen ditch through snowy grassland

Reveal from moon to a bunker on a breakwater in low morning light

Low flight past graffiti-covered bunkers in the IJmuiden dunes

IJmuiden

Low flight over a frozen lake with skaters at golden hour

Flight over snowy fields towards a residential area by a canal

Flyover past a seafarers' monument above tidal flats, overcast sky

Flyover from a river with groynes to a dike and polder landscape

Flyover along the ring dike of the IJsseloog near Dronten

Dronten

Flight along a half-frozen ditch through snow-covered grassland