Probably planted somewhere nearby but now naturalized.
The leaves are triangle heart shape
Green and white leaves
Seen on a sunny, warm day, around 2:30 p.m. It is native form Europe, Scandinavia and Russia. It is a vigorous, aggressive, fast-growing, green perennial that is primarily grown as a climbing vine or trailing ground cover.
Hedera helix (common ivy, English ivy, European ivy, or just ivy) is a species of flowering plant in the family Araliaceae, native to most of Europe and western Asia. A rampant, clinging evergreen vine, it is a familiar sight in gardens, waste spaces, on house walls, tree trunks and in wild areas across its native habitat. It is labeled as an invasive species in a number of areas where it has been introduced.