Fears of Satanic worshippers swirl around five Celtic-inspired megaliths.

This theatre was made famous after Lee Harvey Oswald was captured inside watching a film.

A public fountain that spouts "health water" from a nearby spring.

Shakespeare has been brought to life in this open air theater for the better part of a century.

Single runway interrupted by a busy road that cuts across its middle.

What remains of the summer palace of King Kamehameha III.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Images chiseled into the basalt here date back an estimated 300 years.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This World War II-era bunker is now packed with posters and props from movies and TV shows filmed nearby.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

This blowhole is supposedly caused by a trapped monster.

I Street Bridge is the heaviest swinging center bridge in the United States.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

Concrete strongholds stand guard over the Golden Gate.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Internationally-recognized arts center housed in a century-old former military barracks.

After serving in World War II and picking up Apollo astronauts, this aircraft carrier has been turned into a museum overlooking the San Francisco Bay.

A man-made island in scenic San Francisco Bay.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.