This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

People from around the world visit the shrine of Japan’s legendarily loyal dog.

Smoky, also known as "Yorkie Doodle Dandy," was a four-pound hero of World War II.

One of the most important yet well-hidden museums dedicated to the history of medicine.

Ever hear of the Milazzo Cage?

An artist's mausoleum with a haunting echo.

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

The mystic whose incorrupt corpse still attracts the faithful.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

This influential Renaissance-era library was once the haunt of kings and monks.

A historic Christian shrine nestled within a spectacular natural cave.

The mysterious remains of a martyred teenage saint are venerated inside a small country chapel.

This 19th-century fountain's namesake animal isn't what you think it is.

This enormous censer uses a pulley system installed over 400 years ago.