Harmankaya Nature Park (Turkish: Harmankaya Tabiat Parkı) is a nature park located in Termal district of Yalova Province, northwestern Turkey.

[1] Harmanlı Nature Park is located 18 km (11 mi) to Yalova, 6 km (3.7 mi) to Termal and 5 km (3.1 mi) to Üvezpınar village, and situated south of Termal district on the road between Üvezpınar and Sudüşen Waterfall close to the provincial border to Bursa.

Other flora of the park are the trees silver linden (Tilia argentea), sweet chestnut (Castanea sativa), common hornbeam (Carpinus betulus), Hungarian oak (Quercus frainetto), sessile oak (Quercus petraea) and Turkey oak (Quercus cerris), as well as the flowering plants greater snowdrop (Galanthus elwesii), toothpickweed (Ammi visnaga), Italian arum (Arum italicum), bellflower (Campanula lyrata), peach-leaved bellflower (Campanula persicifolia), bladder campion (Silene vulgaris), leafy goosefoot (Chenopodium foliosum), nettle-leaved goosefoot (Chenopodium murale), charlock mustard (Sinapis arvensis), whitetop (Lepidium draba), stinkwort (Inula graveolens), coltsfoot (Tussilago farfara), golden marguerite (Anthemis tinctoria), common wormwood (Artemisia vulgaris), spear thistle (Cirsium vulgare), musk thistle (Carduus nutans), yellow star-thistle (Centaurea solstitialis) and many others.

[1] Observed fauna are the mammals gray wolf, jackal, fox, wild boar, the amphibian frog, the reptiles tortoise, lizard, snake and some bird and songbird species.

This geographical article about a location in Yalova Province, Turkey is a stub.