From List of National Natural Landmarks, these are the National Natural Landmarks in Guam. There are 4 in total. All sites are on lands owned by the territorial government.

	Name	Image	Date	Location	County	Description
1	Facpi Point		1972	13°20′29.61″N 144°37′57.57″E / 13.3415583°N 144.6326583°E / 13.3415583; 144.6326583	Guam	Contains pillow lava, intersecting dikes, and a massive sea stack of black coralline limestone.[1]
2	Fouha Point		1972	13°18′25.16″N 144°39′18.91″E / 13.3069889°N 144.6552528°E / 13.3069889; 144.6552528	Guam	Contains exposures of volcanic rock with a nearby intertidal platform of two levels of coralline limestone.[2]
3	Mount Lamlam		1972	13°20′23.13″N 144°39′56.35″E / 13.3397583°N 144.6656528°E / 13.3397583; 144.6656528	Guam	A remnant of a great caldera.[3]
4	Two Lovers Point (Puntan Dos Amåntes)		1972	13°32′5.97″N 144°48′8.83″E / 13.5349917°N 144.8024528°E / 13.5349917; 144.8024528	Guam	A 370-foot-high (110 m) cliff exposure of massive limestone.[4]