Annisquam Lighthouse at Night

I was hoping to capture a beautiful sunset on my day off, but I got a late start and arrived just as the sun was almost below the horizon. There was some nice cloud cover in the sky but the colors never really came through, so I decided to wait for "blue hour." The main challenge with this images was keeping detail in the both the dark beach as well as the street and city lights in the background.

Nikon D810, 30 sec @ f/6.3, ISO 1600, 24-70