Traveller's cheques and credit cards (American Express, Visa, Mastercard) are exchanged for Vietnamese dong at the banks. Cards can be used in travel agencies, hotels, and major restaurants. US currency is exchanged for Vietnamese dong and treasury notes in banks, exchange bureaus, hotels, and jewellery shops.
Nikola Tesla designed the first hydroelectric power plant at Niagara Falls, New York which started producing electrical power in 1895. This was the beginning of the electrification of the United States and the rest of the world. Today, Teslaâs AC electricity is lighting and powering the globe.
Expedition leaders Meriwether Lewis and William Clark first learned of the great falls from the Mandan Indians while wintering at Fort Mandan from November 2, 1804 until April 7, 1805. The Lewis and Clark Expedition discovered the Great Falls of the Missouri on June 13, 1805. Meriwether Lewis was the first white person to see the falls. Lewis described the encounter in a now-famous passage of his expedition diary: The falls which Lewis had seen were the lowest of the five falls, the Great Falls.