culture. The Teide volcano was for the Canarian aborigines (Guanches) a kind of axis mundi. In ancient Mesopotamia, the cultures of ancient Sumer and Babylon built tall platforms, or ziggurats, to elevate temples on the flat river plain. Hindu temples in India are often situated on high mountains — e.g., Amarnath, Tirupati, Vaishno Devi, etc. The pre-Columbian residents of Teotihuacán in Mexico erected huge pyramids, featuring staircases leading to heaven. These Amerindian temples were often placed on top of caves or subterranean springs, which were thought to be openings to the underworld. Jacob's Ladder is an axis mundi image, as is the Temple Mount. For Christians, the Cross on Mount Calvary expresses this symbol. The Middle Kingdom, China, had a central mountain, Kunlun, known in Taoist literature as "the mountain at the middle of the world." To "go into the mountains" meant to dedicate oneself to a spiritual life. As the abstract concept of axis mundi is present in many cultural traditions and religious beliefs, it can be thought to exist in any number of locales at once. Mount Hermon was regarded as the axis mundi in Canaanite tradition, from where the sons of God are introduced descending in 1 Enoch (1En6:6). The ancient Armenians had a number of holy sites, the most important of which was Mount Ararat, which was thought to be the home of the gods as well as the center of the universe. Likewise, the ancient Greeks regarded several sites as places of Earth's omphalos (navel) stone, notably the oracle at Delphi, while still maintaining a belief in a cosmic world tree and in Mount Olympus as the abode of the gods. Judaism has the Temple Mount; Christianity has the Mount of Olives and Calvary; and Islam has the Ka'aba (said to be the first building on Earth), as well as the Temple Mount (Dome of the Rock). In Hinduism, Mount Kailash is identified with the mythical Mount Meru and regarded as the home of Shiva; in Vajrayana Buddhism, Mount Kailash is recognized as the most sacred place where all the dragon currents converge and is regarded as the gateway to Shambhala. In Shinto, the Ise Shrine is the omphalos. Sacred places can constitute world centers (omphalos), with an altar or place of prayer as the axis. Altars, incense sticks, candles, and torches form the axis by sending a column of smoke, and prayer, toward heaven.