When was Niagara Falls built?
1679
1825
1825
1825
1825
1835
1829
1830
1815
1825
1835
1826
1829
1838
1832
1830
1869
1823
1815
1825
1835
1813
1824
1837
1863
1833
1829
1830
1827
1815
1826
1838
1832
1825
1835
1829
1830
1869
1823
1860
1813
1824
1837
1854
1825
1835
1863
1833
1831
1804
1827
1811
1815
1830
1830s
1826
1829
1838
1832
1818
1825
1869
1835
1830
1823
1860
1860s
1813
1824
1837
1854
1863
1833
1831
1804
1830s
1825
1827
1811
1867
1815
1807
1834
1826
1829
1838
1832
1818
1805
1830s
1812
1825
1869
1835
1830
1823
1790
1816
1860
1813
1824
1837
1854
1863
1819
1833
1825
1831
1804
1827
1811
1867
1815
1807
1834
1836
1830s
1860s
1826
1829
1838
1832
1818
1805
1810
1825
1812
1869
1830s
1835
1823
1790
1816
1860
1843
1813
1824
1830
1825
1837
1854
1863
1819
1833
1808
1806
1831
1855
1830s
1804
1827
1811
1883
1867
1815
1807
1834
1836
1826
1829
1838
1832
1866
1803
1818
1805
1810
1812
1825
1869
1835
1823
1871
1790
1816
1860
1843
1824
1830
1809
1813
1837
1854
1863
1819
1833
1808
1806
1831
1855
1804
1827
1811
1883
1867
1815
1807
1834
1836
1826
1829