- Micronesian Diver’s Association has information on the may local dive sites as well as boat dives around the island. Highlights include: The Blue Hole, a more advanced dive with an incredible drop through a hole in the reef; and the Kitzagawa Maru and Tokei Maru, two Japanese warships sunk out in Apra Habor.
- Chamorro Night Market. Wednesday nights at the Chamorro Village in Agana. Somewhat overpriced and touristy– in fact, certain restaurants and shops (which are there permanently during the week) will actually charge more during the night market than they do normally.
- Mangilao Night Market. Thursday nights at the Santa Teresita Church in Mangilao. A more community-oriented night market with generally cheaper prices and a greater selection of local (if not always Chamorro) food.
- Fish Eye Marine Observatory. An underwater observatory at the Piti Bomb Holes Preserve. If you don’t want to pay the fee, you can just swim out (following the pier) and snorkel in the area to the left of the observatory. Vast (but not particularly diverse) forests of both hard and soft coral can be found.
- Cabras Island Channel. Park across the street from the Cabras power plant. There is an artificial channel for coolant water. No swimming, but the water is very clear, and you can see various coral and fish as well as some particularly evil-looking sea urchins. A path along the left side of the channel will lead you out to the ocean.
- Gun Beach. From Tumon, head north, pass the Hotel Nikko and take the next right to the Beach Bar. Multiple signs will claim that parking is for Beach Bar patrons only– however, they fail to mention the public (dirt) parking lot immediately to the right of the Beach Bar parking. If this area is full, park at the Nikko’s public parking area and walk past the dumpsters to the small beach access path. As with the rest of Guam, snorkeling areas are quite far out from the shore. There is also a pathway along the rock cliff to another beach.
