Subjects: New York (State), New York (State), Waterfalls, Niagara Falls (N.Y. and Ont.), Tourist trade, Observation towers
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: New York (State), New York (State), Waterfalls, Niagara Falls (N.Y. and Ont.), Tourist trade, Observation towers
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: New York (State), New York (State), Waterfalls, Niagara Falls (N.Y. and Ont.), Tourist trade, Observation towers
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: New York (State), New York (State), Waterfalls, Niagara Falls (N.Y. and Ont.), Tourist trade, Observation towers
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: New York (State), New York (State), Waterfalls, Niagara Falls (N.Y. and Ont.), Tourist trade, Observation towers
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Photographer: Jernegan, E. (fl. 186--187-)
Subjects: New York (State), Catskill Mountains (N.Y.), Ulster County (N.Y.), Observation towers, Saugerties (N.Y.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Photographer: Brigham, E.T.
Subjects: New Hampshire, Dover (N.H.), Observation towers
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Publisher: Kilburn Brothers
Photographer: Kilburn Brothers
Subjects: New Hampshire, Bethlehem (N.H.), Observation towers
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]