autumn color colour England english fall Great Britain Kensington Gardens lake leisure London park parkland pleasure pond trees water bank bridge buildings center city from the sky green motorway panorama river roofs sky street thames yards alone cold crunch curve forest hike leaves pale path ramble snow Trek walk walking winter wood woods conifers countryside fence fields hedge hills landscape lane nature Powys road rural slope track view wales welsh Acer brown maple red russet rusty Surrey village destination direction oak spring Sussex transport travel tree verge deciduous footpath natural trail trunks woodland cloud gray grey hill storm exercise outdoors stile bushes castle cliff fake folly Kinnoul orange Perth rocks ruin scotland tower viewpoint