Two stone columns flank the grand Venice square, but there were supposed to be three.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

This giant temperature attraction created some giant electric bills.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

This Shetland Islands bus shelter may be small, but it squeezes in a couch, a desk, some art, and even an old telly.

This forgotten boat elevator was an engineering marvel in its heyday.

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

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

An architectural oddity hides in plain sight on this iconic London bridge.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

A historic arena where the Beatles played their first concert in the U.S.

A line of abandoned, alien-like fortresses dot the mountains of North Italy.

A building shaped like the Army Corps of Engineers logo, because why not?

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Before Nixon, "watergate" meant canals.

There’s a special club house at the top for the bell ringers.