Beside a busy highway, a colony of Great Blue Herons raises hundreds of offspring each year.

Faces carved into the cliffs create an otherworldly walking trail.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

An artist of the American Revolution is entombed beneath the Yale art gallery he founded.

A life-sized imperial army, buried in battle formation, has stood underground for over 2,000 years—built not for war, but for eternity.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Saint Borromeo often prayed in this austere crypt during the 16th century.

"The prettiest love letters in the world" ... or so said Lord Byron.

Third time's a charm, or in this case, two testicles are.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

The mark of the Devil's horns on a marble column in Milan.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The secret medieval communication system will whisk your words above the noise of the crowd.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

One of Vienna’s oldest (and perhaps most haunted) alleys, allegedly with a bloody past that gave it its name.

Baroque celebration of the end of the Great Plague of Vienna.

The final resting place for the remains of 143 Habsburg royalty.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

The Habsburgs' royal collections of art and wonders.

The largest fountain in Bratislava.