No, you’re not seeing triple - these are Pittsburgh’s Three Sisters, a trio of nearly identical suspension bridges erected side by side over the Allegheny River.

Rachel Carson (Ninth Street Bridge)

All three were built between 1924 and 1928 by the aptly-named American Bridge Company, and they are the only trio of nearly identical bridges, as well as the first self-anchored suspension span bridges in the United States.

Andy Warhol (Seventh Street Bridge)

The 9th and 7th street bridges are named for Pittsburgh natives Rachel Carson and Andy Warhol, whilst the 6th is named for the baseball player Roberto Clemente, who played for the Pittsburgh Pirates, whose home field is the nearby PNC Park baseball stadium.

Roberto Clemente (Sixth Street Bridge)

Thanks to Google’s Street View feature, as well as being able to see what these bridges look like when you’re on them, we can also see what it’s like to cross the 6th street bridge and see the other two.

Thanks to Nitehawk. Read more about the Three Sisters at Wikipedia.

See our previous posts Double Bridge Shadow, Double Drawbridge and Three Sisters, Australia.

The skeptics amongst you might initially think that this bizarre twisted lake isn’t natural real, but rather that the Google engineers have just discovered Photoshop’s Twirl feature. However I assure you that it is real, as it’s only a few minutes down the road from where I work!

This is actually a sculpture, “Landform” by Charles Jencks - an immaculately sculpted earth, grass and water monument in the grounds of the Scottish National Gallery of Modern Art, Edinburgh. The artist describes it as being “based on a strange attractor and the flow of earth and traffic”.

The best thing about Landform though, is that you can wander around all over it, as several people can be seen doing on the day this image was taken.

Read more about Charles Jencks and the Scottish National Gallery of Modern Art at Wikipedia.

Thanks to Fred B.

Welcome to the first annual GSS Desert Week! In time-honoured tradition, we’ll mostly be posting about deserts. For about a week!

The Namib Desert in Namibia and Angola forms part of the Namib-Naukluft National Park, and covers an area of 50,000 km². This part of the world has experienced arid conditions for at least 55 million years, which makes the Namib Desert the oldest desert in the world.

The Namib covers much of the Atlantic Ocean coast of Namibia, where the collision of the water-laden sea air and the bone-dry desert air causes immense fogs and strong currents, making this place as notorious for ending the lives of sailors as the more famous Skeleton Coast to the north. There are plenty of shipwrecks to be found in this imagery for those that care to find them!

Away from the coast, this massive desert receives less than 10 mm of rain annually and is almost completely barren, apart from the spectacularly complex dune patterns.

In the eastern part of the desert we find the famous Sossusvlei salt pan, which can sometimes be seen filled with water when a flash-flood fills the Tsauchab river. Note the tourist buses parked in the shade of a tree.

To the south is the Dead Vlei salt pan where even from up here we can spot the “skeletons” of trees which are believed to be about 900 years old - scorched black by the sun and unable to decompose due to lack of moisture.

Perhaps most impressive of all the sights here though, are the mammoth dunes which surround the salt pans. Some of them rise up to 340 metres, which makes them the highest sand dunes in the world.

Check out the photos on Flickr of giant dunes, tree skeletons, and the dunes as seen from in the Dead Vlei.

See Wikipedia for more info on the Namib Desert, the Namib-Naukluft National Park, the Tsauchab, Sossusvlei and the Dead Vlei.

The town of Holbrook, Australia, is notable as home to the only set of traffic lights between Sydney and Melbourne. Slightly more interesting though is that here, 160 miles inland we can plainly see a full-size submarine.

Originally this place was known as Germantown (a name that didn’t sit too well during WWI), so they chose the new name to honour Lieutenant Norman Douglas Holbrook, a British submarine captain who had been awarded the highest military decoration, the Victoria Cross.

80 years later the town was gifted the stern section of the HMAS Otway, an ex-Royal Australian Navy submarine. Despite Lt. Holbrook not having had anything to do with this particular submarine, the residents had by now fallen in love with all things submarine, and subsequently tried to raise funds to purchase the rest of the decommissioned vessel.

Unfortunately, even with a large donation from Holbrook’s widow, they only raised enough cash to purchase the top half, which is what we see protruding from the ground here.

Read more on the sub over at Wikipedia and see ground level pictures on Flickr.

Thanks to Simon Burgess.

The town of Progreso, Mexico, sits on a limestone shelf that falls away extremely gradually as it gets further out to sea. As a result, when they built a pier to allow cruise ships to dock here, it had to be long. Really long.

Measuring a phenomenal 6.5 kilometers (4 miles), this is the world’s longest pier.

The original pier was completed in 1942, and despite being little more than a two-lane highway, is actually quite nice looking seen from the beach. In this satellite shot you can clearly see where the original construction ends, and the more recent one begins.¹

Cruise ships dock here for a day or two to allow the tourists to visit some of the nearby archaeological sites, and we can see there’s one berthed here at the moment. Tourists need to take a bus to shore, which takes nearly 10 minutes!

The pier also plays a major part in the local container industry - we can see loads of them stacked on the pier - and there’s also a tanker here just now too.

For more long piers, see our previous posts on England’s 2.1 km Southend Pier (the world’s longest pleasure pier) and Australia’s 1.8 km Busselton Jetty².

Thanks to cboone and Michael.

Just off the coast of Portsmouth, England, we can a group of sailing vessels engaged in some competitive harbour or buoy racing.

The vessels just rounding the buoy as the image was captured were facing some stiff competition, but the leaders of the pack appear to be way out in front.

On the beach we can see the Seafarers Sailing Club, and according to Google Earth the image that captured the race was taken on April 21st 2007 - which would mean that we’re seeing the 3rd race in the Seafarers Sailing Club Spring Series, which was won by sail number 1178 with K. Stares at the helm!

Given that Portsmouth has such a long naval history¹ is hardly surprising that there’s about a hundred zillion different kinds of boats to see in the area, so why not go for a virtual wander and see what interesting boats you can find?

See our previous post about Portsmouth’s Spinnaker Tower and some of the ships on display there, or brush up on this kind of Yacht racing and the Racing Rules of Sailing at Wikipedia.

Thanks to ZaberNS.

Here in Lake Berryessa, California, we find the largest drain hole in the world, affectionally known locally as The Glory Hole.

Narrowing from 22 metres diameter to 8.5 metres at its thinnest point, this absolutely enormous funnel is technically the largest “morning glory spillway” in the world - an uncontrolled outlet which, should the water level rise sufficiently high, allows up to 1370 m³ per second (48,400 cubic feet) of water to bypass the Monticello Dam. Check out this photo of the spillway in full flow.

The spillway’s horizontal exit is on the southern side of the dam, and this ground level shot demonstrates why this is a popular spot for local skateboarders and bikers during the drier months!

Read more about spillways, the Monticello Dam and Lake Berryessa at Wikipedia, and trophybassonly.com has some fascinating photos of the spillway during construction in the 1950s.

Thanks to Mark and fogonazos.

Ville de Bordeaux is a carrier vessel that has been specially designed to transport various pieces of the Airbus A380 around the globe.

Given that the A380 is the largest passenger airliner in the world, it’s no surprise that the ship which carries it has its own world record (although it’s not as exciting) - Ville de Bordeaux has the largest ever watertight stern door on a ro-ro¹ vessel!

Collecting pieces from manufacturing sites in Germany, Spain and Wales, Ville de Bordeaux can be seen here docked at Bordeaux’s Pauillac terminal, where she drops off the various plane parts. Look closely and you’ll see the cargo door is open, and an aircraft fuselage has been rolled across the pontoon and transferred onto a barge.

This is actually one of two specially built semi-submersible barges which collect the cargo before heading south down the river to Langon, where the aircraft is unloaded for road-transport to Toulouse for final assembly (where, as previously posted, you can see the finished product).

You can follow the full story of A380 transport on the Google Earth Community. There’s also ground level pictures of Ville de Bordeaux on Flickr or see where she is right now with Vessel Tracker.

Thanks to Rene73.