Every fall this lake mysteriously drains, like a bathtub with the plug pulled out.

The granite head appears to be deep in thought and half buried in the ground.

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

Named for its similarity to the tip of a violin's bow, this striking formation was created by millions of years of erosion.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

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

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

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The National Park Service’s best-kept secret with views that rival any in D.C.

The "lovely red Vega" of the legendary record-settling pilot.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

This natural sea cave hides a small wonderland of natural turquoise beauty.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

A mysterious spot where the laws of gravity seem not to apply.

Iconic rock formations that allow for exploration during high or low tide.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

This tribute to the fictional detective stands at the famous literary character's address.

The bones of two medieval royal lions were discovered at the historic fortress.

The ritual has been performed uninterrupted for nearly 700 years.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.