Trade winds Fontaine Maury collected enough information to create wind and current charts for the world's oceans. As part of the Hadley cell, surface air flows toward the equator while the flow aloft is towards the poles. A low-pressure area of calm, light variable winds near the equator is known as the doldrums, near-equatorial trough, intertropical front, or the Intertropical Convergence Zone. When located within a monsoon region, this zone of low pressure and wind convergence is also known as the monsoon trough. Around 30° in both hemispheres, air begins to descend toward the surface in subtropical high-pressure belts known as subtropical
Cave of the Winds (New York) and walkways. Tropical storm-like conditions can be experienced, as winds can reach up to 68 mph underneath the falls. The cave was obliterated in a massive 1954 rockfall and subsequent dynamiting of a dangerous overhang. Today, the "Cave of the Winds" is the name of a tourist attraction near the same site. An elevator takes people from the area between the American and Canadian Falls down to the level of the Niagara River at the base of the American Falls. A series of redwood decks and platforms allow sightseers to walk right up to the base of the Bridal Veil