Llyn Brianne is a man made reservoir on the River Towy, west Wales, which was formed by the construction of the UK’s tallest dam, which at around 90m tall is the world’s largest clay core dam.

Recently the BBC has uncovered that thrill-seeking kayakers have been sliding down the reservoir’s spillway during times of high water, which probably makes this the world’s largest water slide.

This “dangerous” activity has been banned by Welsh Water but, as this video on the BBC shows, it looks like one hell of a way to spend an afternoon.

At the time these images were taken the spillway was in full flow but apparently, at times of low water, a couple of houses that were submerged to make way for the reservoir can be seen protruding from the surface.

Thanks to VGT and the BBC.

More about the Llyn Brianne Reservoir Spillway at Wikipedia.

Namibia’s Skeleton Coast is named so for two different types of skeletons that littered the beaches: whales and ships.

Thanks to the end of mass whaling the whale bones are now all gone, but the bones of ships remain, very slowing rusting away.

For example, the Eduard Bohlen ran aground here way back in 1909.

There are purportedly thousands of ships lining this coast, thanks to the gale force winds, thick fog and ferocious surf.

The Otavi ran aground in 1945, with a load of Guano she was shipping from Mercury Islands.

Once run aground, the sailors are usually also destined to add to the coast’s name, as the previously featured Namib Desert is totally inhospitable.

Despite this, someone once thought it was a good idea to build an oil rig just inland. But just like the whales, ships, and sailors, the rig is now a rotting skeleton.

Since 1971 the Skeleton coast has been a protected National Park, and the old rig does provide good shelter for the local bird population.

The most famous of the Skeleton Coast’s wrecks was the Dunedin Star cruise liner, which sank just off the coast in 1942. The dramatic rescue attempt included the additional wrecking of a rescue boat and small plane, and the whole story is documented in John Marsh’s book Skeleton Coast.

Thanks to sasroodkapje’s fantastic visible shipwreck collection and Artificial Owl, who have ground level images of the oil rig.

Here at Google Sightseeing we love to explore abandoned, off-limits places, much as the rest of the Internet does – from a safe distance. In the past we’ve featured abandoned towns, cities, mines and even whole abandoned islands, but we’ve never yet featured an abandoned experimental pond.

While not normally the subject of much experimentation (after all, ponds are already very good at being ponds), this particular pond was built in the early 1960s by the Nippon Steel Corporation as part of an investigation into the osmotic pressure produced between fresh and sea water.

As it turned out, the sea water was deemed “too salty”, and just like that, Nippon Steel gave up on the whole idea.

Today the pond, known as ‘Shintou Jikken Ike’, is instead the cosy home to a colony of happy cormorants – which just goes to show you that sometimes a pond is just a pond.

Here’s some ground level photos of the pond as discovered by a wandering Japanese photographer.

Thanks to Hide.

It’s Island Week 3 here at GSS, which means we’ll mostly be posting about Islands. It’ll probably last about a week.

Bruny is one of 20 islands and island groups in the Australian state of Tasmania, the largest island of which is also called Tasmania.

Thanks to the recent addition of Street View imagery for Australia, today we’re going to take our first Street View island day trip! Packed lunches will not be provided.

To get onto Bruny from Tasmania itself we have to take a ferry:

Once we’ve arrived at the other side, we can see an aerial shot of the ferry, with lots of cars waiting to board:

The island of Bruny has a population of just 600 people, and the economy relies on wildlife tourism. However, I’ve not spotted any wildlife yet.

Bruny’s other main attraction is the Cape Bruny Lighthouse, so let’s drive down to see that:

The lighthouse’s main claim to fame, if you can call it that, is that it was the “oldest lighthouse under continuous operation by the Commonwealth”. I’m sure you’re impressed: feel free to take photos.

Unfortunately, the Street View driver drove so slowly that it’s getting dark already, so we’ll have to pack up our picnics and head back to Tasmania. Here’s the ferry queue from the other side:

And, once docked at the other side, here’s the Google Car inside the ferry! Keep your hands inside the vehicle please.

I hope you all enjoyed our day trip to Bruny Island! Please tip the driver.

More info on Wikipedia: Bruny Island.

Thanks to Howder.

It’s Island Week 3 here at GSS, which means we’ll mostly be posting about Islands. For about a week.

Schiermonnikoog is a small island off the coast of the Netherlands, that only 758 years ago was actually 2 kilometres north of its current location, and a completely different shape to boot! A combination of current, tides and wind have actually moved this island at the astonishing rate of around 2.64 metres per year.

The island’s name, “Schiermonnikoog” translates into English as “Island of the grey monks” and was named for the colour of the robes of the Cistercian monks who first owned this tiny piece of land. Today it stands as a municipality in its own right, and with only around one thousand inhabitants, is the least densely populated municipality in the Netherlands.

See our April 2008 post on Sea Reclamation for more on coastal erosion.

Thanks to Arjan.