This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The "Seinfeld" diner.

Elevated freight railway turned wildly successful urban park.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A genuine Tudor manor transported piece by piece from England.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The national park was once a plantation estate.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

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

A contemporary fresco movement illustrates the region's rich history.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

The stunning interior of this Gothic church is covered in ornate gold details.

A lush oasis full of vibrant plants and striking geometric displays.

This giant sculpture made of trash is a critique of society's wastefulness.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Ancient catacombs form the foundation for this Rococo orgy of a church.

A unique seaside cave where Aleister Crowley faked his own death.

A hidden three-foot-wide house separates these two regal churches.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This unreal Portuguese palace looks as though it's made from a pile of different castles.