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

A Hawaiian stairway to heaven—that you can't climb.

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

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

The celebrated eyesore created by starry-eyed sweethearts.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Largest Roman Catholic church in North America.

At 207 feet, one of the world's longest continuous escalators.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The site of the climactic scene from the classic horror film is now a historic landmark.

Home to items never before seen by the public.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Mysterious stone tower featured in many alternative histories of the New World.

Ice cream stand, snack bar, and time capsule of milk conveyance.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.