Can anyone figure out what on earth this giant egg-like thing is, near Acton, Massachusetts? Update: As ever our readers have come to the rescue, and it seems that this is the Annursnac Hill Reservoir, a covered water storage facility…

This is the Foster City sign in (you guessed it) Foster City, California. Founded in the 60s, Foster City is built entirely on landfill in what was previously marshland. Matt Schneider says that during the 1989 Loma Prieta Earthquake the…

My slackness in posting any sights so far this week is entirely the fault of the Edinburgh design agency where I work, who insisted on taking us all to Dublin this past weekend for our Christmas party! Anyway, the Guinness…

In 1924 this former coral rock quarry near Miami was transformed into Coral Gables Venetian Pool, complete with cascading waterfalls, coral rock caves and a palm-fringed island. Apparently it is the only pool in the US to be included in…

It seems that the reservoir of the Taum Sauk pumped storage plant in Missouri burst today. The reservoir sits on top of Proffit Mountain, some 800 feet above the hydroelectric plant, and when a section of the reservoir collapsed, it…

This is San Francisco's popular tourist spot, Pier 39, and covering nearly every square inch of those floating docks in the harbour are hundreds upon hundreds of sea lions. The light coloured patch in the middle-left is the only bit…