Below is my trial of the west end of Heddon's preserved section of Hadrian's Wall.
It is for those who are not able to visit it (or sit on it, as I do from time to time). Click the big arrow to load the model, use the controls to alter rendering and the computer mouse to rotate (left-button and drag), pan (right button and drag) and zoom (wheel or ctrl-drag). For the truely immersive experience switch on full-screen mode!
It's just like being there yourself.
The broad wall at Heddon is between 2.8m and 3m wide and up to 1.7m (7 courses) high. The rubble core was originally set in puddled clay, but was reset in mortar to preserve the section when it was consolidated. The first 12m at the west end has only the outer face exposed.
At the west end (NZ 13622 66942) a circular kiln was built into the wall in medieval times, probably to dry corn. It measures 1.9 m in diameter, has a paved floor, and the surrounding wall has a maximum height of 0.7 m (3 courses). The flue is in the south-west arc and is 1.4 m wide.
The inscriptions are transcribed on this site under number  where there are also some standard, 2D photos.
If you are more interested in prehistoric rock art, there is another model here.