Blue hole
down to 91 m
Blue Hole
A vertical shaft from 18 m with a window onto the wall at about 40 m, and visibility that can reach 30 m or more.
- Experienced
- Whale sharks
Dive site in Guam
The round holes on Piti's reef flat were mistaken by early visitors for bomb craters, but they are natural formations. The Fish Eye observatory lets visitors descend to viewing windows about 30 feet below the surface.
Source: world.dan.org
A reef dive from the shore. Known for blacktip reef sharks.
Recommended minimum: Open Water (PADI Open Water, CMAS/FFESSM N1).
Best months: Apr–Aug.
Source: diveadventures.com.auPrices found at the area's dive centres, not specific to this site. Details and sources
The point shows the Guam area, not the exact dive site.
Blue hole
down to 91 m
A vertical shaft from 18 m with a window onto the wall at about 40 m, and visibility that can reach 30 m or more.
Reef
down to 40 m
Shore dive through a cable trench to the outer reef, where green turtles are common and eagle rays glide past the drop-off.
Reef
down to 30 m
Wreck
down to 40 m
German WWI transport scuttled in 1917 in Apra Harbor, now lying beside a WWII Japanese freighter.
Wreck
down to 37 m
A 1943 Japanese freighter lying against a WWI German ship: the only known site where wrecks from both world wars touch.
Reef
down to 21 m
Apra Harbor reef whose top is covered with vast staghorn coral colonies home to thousands of small reef fish.
About this page
Values marked “Estimated” come from our original catalogue and are being checked against published sources one by one. Sourced values link to where they come from. Conditions change with the season, the weather and the tide: confirm with a local dive centre before you dive.