Philippine Stamps and Topical Stamp Collecting, 2nd Edition

1932, May 3: Vernal Falls (Labeled: Pagsanjan Falls) - 1 stamp from a set of 7 stamps showing various places in the Philippines (Denomination and Image: 18c and Vernal falls in Yosemite National Park)

1959, November 18: Maria Cristina Falls - Set of 2 stamps issued to publicize the World Tourist Conference (Denomination and Image: 6c and Maria Christina falls; 30c and Maria Cristina falls)

1971, February 15: Pagsanjan Falls - 1 stamp from a set of 4 stamps issued for the Tourist Publicity series 1970-1971 (Denomination and Image: 30s and Pagsanjan falls, Laguna)

2003, June 27: Philippine Waterfalls - Set of 1 se-tenant block of 4 stamps and 1 souvenir sheet of 4 stamps (Denomination and Image for the se-tenant stamps: P6.00 and Maria Cristina falls; P6.00 and Pagsanjan falls; P6.00 and Bagongbong fall; and P6.00 and Katibawasan falls / Denomination and Image for the souvenir sheet: P24.00 or P6.00 x 4 and Casiawan falls, Pangi falls, Tinago falls and Kipot Twin falls)

2011, October 24: Batlag falls – 1 stamp from a se-tenant pair issued for the International Year of the Forests (Denomination and Image: P7.00 and Batlag falls)

2014, September 22: Waterfalls of the Philippines and Tourist Destinations – Set of 1 se-tenant block of 4 stamps and 1 souvenir sheet (Denomination and Image for the se-tenant stamps: P10.00 and Balagbag falls; P10.00 and Merloquet falls; P10.00 and Tinago falls; and P10.00 and Asik-Asik falls / Denomination and Image for the souvenir sheet: P40.00 and Tinuy-an falls; Miniature sheet of 16 stamps exists.)

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Legend:

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P - Philippine peso (pesos)
c - centavo (centavos)
s -  sentimo (sentimos)
x - multiply by (times)