Such is the volume of new imagery that is added to Google Earth, that by the time we got around to posting the longest cross-sea bridge in the world, it had already been superseded.

Fortunately for us however, the current reigning champion was captured whilst still under construction, which means that we’re able to bring you the longest cross-sea bridge on Google Earth, China’s Donghai Bridge.

Measuring a whopping 32.5 kilometres (20.2 miles), the Donghai Bridge was completed in 2005, and connects Shanghai (above) to the Yangshan Islands in the East China Sea.

Most of the six lane bridge is low-level viaduct, but there are two cable-stayed sections which allow ships to pass, the larger of which has a span of 420 m.

Apparently the seemingly meandering path the bridge takes across the East China Sea was specifically designed to keep drivers more alert during their long crossing.

While questions have been raised over the financial logic of projects like the Donghai Bridge, China is rapidly emerging as the new Land of Long Bridges. China now has seven of the top twelve longest bridges in the world, all of which were completed in the last 5 years.

There’s information about and a great picture of the Donghai Bridge available at Wikipedia. You can also read about the current longest cross-sea bridge, which will likely also have been superseded by the time we get to it.

Thanks to Lukas Nowacki and Tom.

Google is in trouble. The company now has so much money that it’s finding it increasing hard to spend it all - so as a first step has decided to employ a 2 car convoy to capture Street View images!

This means that we get a nice close up of the camera that is used, but strangely it doesn’t appear to be the same as the ones that have been caught elsewhere in either Paris or London.

As has been widely rumoured, it’s possible that this second car is separately collecting 3D imagery using a special laser camera (which bounces off nearby objects to create a 3D map, onto which the street view imagery can be laid).

The two cars rather quickly split up though, so they were probably just setting off from the same place. Of course, there’s always the possibility that new 720° imagery is just round the corner!

Thanks to streetviewfun.

An erratic boulder is, simply enough, a piece of rock that doesn’t originate from the place where it is found. When these errant boulders are the size of houses however, they take a little more explaining.

The city of White Rock, British Columbia, gets its name from a large white erratic that seems completely out of place sitting on the shore of Semiahmoo Bay.

In fact, boulders like this one were carried to their current locations by glacial ice, often over hundreds of kilometres. Geologists have suggested that landslides or rockfalls initially dropped the rocks on top of glaciers, which then carried the rocks along with them on their journeys. When the ice melted, the erratics were unceremoniously deposited wherever we find them today.

The largest glacial erratic identified so far is Big Rock, near Okotoks, Alberta. Measuring 41 m by 18 m and standing 9 m high, this massive quartzite boulder weighs around 16,500 tonnes.

Geologists believe that Big Rock made its epic journey between 12,000 and 18,000 years ago - all the way from Mount Edith Cavell in Jasper National Park - a journey distance of nearly 500 km.

There’s more about Glacial erratics, White Rock, and Big Rock at Wikipedia.

At 6:45am this morning local time, fire fighters were called to a massive blaze taking place at the Weston-super-Mare Grand Pier.

Ironically, the fire service were having difficulty getting enough water to put out the blaze. As you can see in the above image, the pavilion is 800 metres out to sea, and to make matters worse, the tide was out when the fire began.

The pier was first opened in 1904, and was reopened in April this year after a massive revamp. As we’ve seen before it seems to be a tragically frequent occurrence that one of these historic structures burns down, and in fact the Grand Pier previously burnt down in 1930.

Now that the fire has been brought under control, it looks like the pavilion has been completely destroyed, but that the iron foundations of the structure are still standing. Hopefully for Weston-super-Mare someone will undertake the task of restoring the pier to its former glory.

Read more and watch a video at the BBC, see this gallery of pictures or read the pier’s Wikipedia page.

Rounding off our totally unplanned week of obscure towers is… Alton Towers, which is very obscure, being that it’s actually a theme park.

Located in the grounds of a former stately home in Staffordshire, England, Alton Towers opened as a theme park in 1980, and in 2007 it attracted 2.4 million visitors - making it the most visited theme park in the UK.

Alton Towers has a good history of fairly ground-breaking roller coasters, and they currently have 8 in total, including Air - the world’s first B&M flying roller coaster.

Nemesis was Europe’s first inverted roller coaster (Wikipedia).

Probably the best known to this day is Oblivion, the world’s first vertical drop roller coaster (Wikipedia), which opened in 1998 amidst a huge publicity campaign here in the UK. The coaster features a 55m near-vertical drop into a huge dark hole in the ground (ground-level pic).

Of course when I personally went to Alton Towers the first time (all the way back in 1986), the biggest name ride was the Corkscrew (Wikipedia). It’s the park’s oldest coaster, and sadly seems to be reaching the end of its lifespan - it looks likely to be replaced soon. You can clearly see where it gets its name in this image.

Alton Towers is open March to November, and given that the UK has some spectacular weather right now I imagine this weekend will see the 2 km² (500 acre) grounds full to bursting with people queuing for the 125 different rides.

More about Alton Towers, as ever, at Wikipedia.

Thanks to Andrew Senter and Andrew Checkley.