Padayatra festival in Czech Republic (Album with photos)
Srila Prabhupada: The Hare Krishna mantra is specifically mentioned in many Upanisads, such as the Kali-santarana Upanishad, where it is said: “After searching through al the Vedic literature, one cannot find a method of religion more sublime for this age than the chanting of Hare Krishna.” (Sri-Caitanya-caritamrta, Adi-lila, 3.40 Purport)
See them here: https://goo.gl/XFT5bb