An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This black shoreline is made up of exploded lava particles.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The broken skateboards that became a poignant memorial to a murdered skater.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Amsterdam's former hotspot for public executions and dissections.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

An inconspicuous suburban street corner is the site of San Diego's worst air disaster.

One of the largest trees of its kind in California.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

An inconspicuous footbridge beloved by San Diego locals.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

San Diego's most historic and haunted home.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Commonly acknowledged as the only public monument to the Devil himself.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

A six-ton wedding present for the King of the Scots.

A magnificent, iconic stone tower in the Scottish Highlands.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

The most loyal of little dogs, or a Victorian era publicity stunt?