Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The final resting place of soldiers' loyal canine companions.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

Medicinal spa created with the discharge from a geothermal energy plant.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

An encyclopedic collection of mammal penises.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

On the Hudson resides one of the largest clocks in the world.

The world's brightest bioluminescent bay.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A semi-scholarly approach to sex.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Elevated freight railway turned wildly successful urban park.

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

Catacombs turned marketplace.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The trials and tribulations of marking Poe's grave.

Yo, Adrian!

A layered tribute to the work of mosaicist Isaiah Zagar.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

Handcrafted thermal spa washes away each night with the tide.