These formal gardens were designed to be admired from the vantage point of the castle.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

Largest lake in Great Britain measured by surface area.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

A remarkable medieval structure born from a 14th-century disaster.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

The second-largest giant sequoia in the world.

Quite simply the largest tree in the world (by volume).

This municipal playground was co-created by the father of one of the most playful characters ever.

A tree grown from astronaut seeds which were exposed to cosmic rays.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

Most historians agree that the so-called "Gentleman Pirate" wasn't much of either of those things.

The "Seinfeld" diner.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

Priceless space junk on display in front of a local Dairy Queen.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

A stack of stones steeped in Irish folklore, much like the hero they're connected to, hide in plain sight.

Local myth claims this is a Sears catalogue home with its windows installed upside-down.

Abandoned Italianate architecture on the coast of Maine.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.