A magnificent, iconic stone tower in the Scottish Highlands.

This historic observatory was established to keep shipwrecks from littering the Cape of Good Hope.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

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

While these wooden totems bear a striking resemblance to First Nations artwork of British Columbia, their actual origins lay on the opposite side of the Pacific Ocean.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

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

America's first federal monument.

A haunting tribute to pioneering photographer Clover Adams.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

An Australian lake whose pink hue defies scientific explanation.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.