Here's a list of Portals known to the PSOs, with conditions and status.

199 South Murphy Avenue, Sunnyvale - status and condition unknown; leads to the Eidfjord portal, in the 11th Century Juncture.
a small park in an industrial zone of Nanking, China - controlled by the Jammers; leads to the Chamber of Scales, Demon Juncture.
a portal outside of Nanking, China - controlled by the Jammers; leads to a deserted village, near the Great Wall, in 1900 China.
a portal near Shanghai, China - controlled by the Jammers; leads to an unattended shrine outside of Cheng-Ting-Fu, in 1900 China.
from a remote location in Alaska (a bend of the Etivluk River about 15 miles from its confluence with the Colville River on Alaska’s north slope), a portal leads to the Aw Boon Haw Gardens in Boxer Hong Kong. The Alaskan side isn't really monitored or controlled; it's about 120 miles from any towns or villages.
from the Floating Jumbo Restaurant in Aberdeen Harbor, Hong Kong, a portal leads to somewhere in 11th Century China. Controlled by the Ascended.
a portal in a Hong Kong mansion leads to a temple in Boxer Hong Kong; controlled by the Ascended.
from a restaurant in Miami, Florida, a portal leads to the Lowe Observatory, near Boxer-era Los Angeles. Controlled by the Jammers.
from an auto repair shop in Honolulu, Hawai'i, a portal leads to the Chamber of Blood, Demon Juncture. Controlled by the Jammers.

Eidfjord, Norway - status unknown, probably not being controlled or observed; presumably leads to the Sunnyvale portal in the Contemporary Juncture.
Sumela Monastery, the Byzantine Empire - the Gate Ripper currently leads to the Chamber of Dismemberment, Demon Juncture; controlled by the Jammers.
Byzantium - at least one portal controlled by the Ascended, leads to an unknown location in the Contemporary Juncture.
somewhere in China, a portal leads to the Floating Jumbo Restaurant in Contemporary Hong Kong. Controlled by the Ascended.
somewhere in China a portal leads to the Shaolin Monastery on Mount Song in Boxer China. Controlled by the Shaolin monks, presumably.
from a minaret in Ghazni, Afghanistan, a portal leads to somewhere in the Future Juncture. Controlled by the Buro.

a deserted village in the shadow of the Great Wall, about 40 miles NW of Peking, China. Leads to a portal near Nanking, in Contemporary China, controlled by the Jammers.
an un-attended shrine near Cheng-Ting-Fu, about 150 miles SW of Peking, China; leads to a portal near Shanghai, in Contemporary China, controlled by the Jammers.
a fortress island near Shanghai, controlled by the Ascended; leads to a warehouse in Future Hong Kong.
a portal in Nanking, China, controlled by the Ascended; leads to somewhere in modern China; controlled by the Ascended.
a portal in a Hong Kong temple, leads to a mansion in Contemporary Hong Kong; controlled by the Ascended.
a portal in the Aw Boon Haw Gardens, within Hong Kong, China; leads to a remote location in Contemporary Alaska (a bend of the Etivluk River about 15 miles from its confluence with the Colville River on Alaska’s north slope). Not really controlled by anyone, but monitored by the Ascended.
a portal in the Lowe Observatory, near Los Angeles, leads to a restaurant in Contemporary Miami, Florida. Controlled by the Jammers.
Mount Song, aka Song Shan (34 29' N, 112 57' E), in China. The portal is controlled by the "neutral" Shaolin Monastery, and leads to a location in 11th Century China, presumably controlled by the Shaolin monks.

a warehouse in Hong Kong, controlled by the Ascended; leads to the fortress island near Shanghai, in the Boxer Juncture.
a portal somewhere leads to a minaret in 11th Century Ghazni, Afghanistan; controlled by the Buro.

a portal in the Chamber of Dismemberment by Chariot leads to the Gate Ripper in the Sumela Monastery in 11th Century Byzantine Empire.
a portal in the Chamber of Scales leads to a small park in an industrial zone of Nanking, in Contemporary China.
a portal in the Chamber of Blood leads to an auto repair shop in Honolulu, Hawai'i.

TooB Known Portals