While in Australia recently, I took my boys on a trip up the Maroochy River into the Maroochy wetlands. We had all enjoyed our canoe trip into the Noosa Everglades the previous year (https://mountainsrivers.com/2018/09/06/canoeing-in-the-noosa-everglades/) but this time we had a solar-powered canoe. The solar panel charges a battery that runs an electric outboard motor. It produces a reasonable speed and is very quiet. And we certainly appreciated the ease of gliding upriver without effort.
After walking from the White Horse across Uffington Castle perched on the hilltop (see previous post Iron Age hillforts), I walked for about a kilometre to join the Ridgeway track that leads across the Wessex Downs in southern England. I followed this west for about a mile to another Neolithic chambered long barrow known as Wayland’s Smithy. The Smithy is about 100 metres off the Ridgeway nestled in a grove of trees.
The ancient Ridgeway track
Some forest near the Ridgeway
The first version of the barrow was built between 3,590 and 3,555 BC. It was 20m long and the remains of 14 people were buried here in a stone and timber box over a period of less than 15 years. Between 3,460 and 3,400 BC a second larger barrow 56m in length with a stone chamber was constructed over it, and the chambers contained the jumbled remains of several people.
“They heard of the Great Barrows, and the green mounds, and the stone-rings upon the hills and in the hollows among the hills. Sheep were bleating in flocks. Green walls and white walls rose. There were fortresses on the heights.” 
As well as the barrows and stone-circles of my two previous posts, the Wessex Downs have quite a large number of Iron Age fortresses on the hilltops. The closest of these to Avebury, and the first I visited was Barbury Castle, a few miles south of Swindon.
Barbury Castle is perhaps the most remarkable of the Ridgeway hill forts. It’s on the edge of the Marlborough Downs with views in all directions, on the Ridgeway, and it’s huge! It is defined by a broadly elliptical double rampart with a ditch in between, which even after two millennia of erosion, remains quite steep and imposing. The fort was built in the 6th century BC as a refuge against warring tribes. At times of attack, people would bring their animals and shelter in huts inside the 12 acre enclosure. The outer bank was reinforced by huge sarsen stones and the inner bank was topped by chalk blocks and a continuous wooden fence.
The fortress is clearly visible in this satellite photo, taken from Google Earth Pro, and also just outside the western entrance can be seen a round barrow which dates from 1,700 BC.
While in Wiltshire earlier this month, I stayed in the village of Avebury, which lies within the world’s largest megalithic stone circle, and is about a mile north of Silbury Hill (see previous post at Exploring-the-barrow-downs-of-wessex
Constructed over several hundred years during the Neolithic period from around 3,000 BC to 2,600 BC, a large henge (a bank and a ditch) with a large outer stone circle encircles part of Avebury village. Two separate smaller stone circles are located closer to the centre of the henge.
The ditch and mound surrounding the Avebury outer stone circle
The outer stone circle is 332 metres in diameter with a circumference just over 1,000 metres and encloses two smaller stone circles near its centre. The available evidence suggests that in the early Neolithic, Avebury and the surrounding hills were covered in dense oak woodland, and as the Neolithic progressed, the woodland around Avebury and the nearby monuments receded and was replaced by grassland.
I recently had an opportunity to spend a weekend exploring Neolithic, Bronze Age and Iron Age sites on the Wessex Downs. Britain’s “oldest road”, the Ridgeway, runs 87 miles (137 kilometres) across the Wessex Downs eastward to the Berkshire Downs and the River Thames. It has been in use for over 5,000 years and I briefly visited it over 30 years ago.
West Kennet Long Barrow, an early Neolithic grave.
West Kennet Long Barrow
At the western end of the Ridgeway, a couple of miles from Avebury, I visited West Kennet Long Barrow which was built during the early Neolithic period around 3,650 BC. There are five stone burial chambers in the eastern end, and at least 46 people were buried here over a 1,000 year period. The entrance consists of a concave forecourt with a facade made from large slabs of sarsen stones which were placed to seal entry towards the end of its life.
Large sarsen stones guard the entrance to the Barrow
Seeing Free Solo (mountainsrivers.com/free-solo-inspiring-and-disturbing/) reminded me of my “free solo” on Federation Peak years ago. Barely a rock climb, but the exposure was similar to that on El Cap. In Dec 1980- Jan1981, I did a three week traverse of the Eastern and Western Arthur Range in southern Tasmania with my then wife. One of our objectives was to climb Federation Peak (1,224 metres or 4,016 ft), whose spectacular summit rises like a spike in the middle of the Eastern Arthur Range (see photo below).
Looking towards Federation Peak from the Four Peaks.
I went to Basil for a powerlifting competition in mid-March and stayed in a small town just outside Basel called Kaiseraugst. In this town are the remains of the Roman town, Augusta Raurica, which was founded around 15 BC and named after Augustus Caesar and the local Celtic inhabitants, the Raurici. At its height around 100 AD, the town had around 15,000 inhabitants. The surrounding modern town is now called Kaiseraugst (Caesar Augustus) and I stayed in a hotel just across the road from the fortress (see below). I spent an afternoon visiting the ruins of Augusta Raurica, which has the best-preserved Roman theatre north of the Alps. This theatre once seated between 10,000 and 12,000 visitors.