Sentinel

NIKON D80, 210.0 mm, f/4.0, 2 sec, ISO 200 AF Zoom-Nikkor 70-210mm f/4 CC-BY-NC-ND-4.0

Watchtower beside the railways in Budapest.

(Oh, by the way: this entry was written by Peter Molnar, and originally posted on petermolnar dot net.)