A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

Stockholm's tiniest statue is of a small boy looking at the Moon.

Stockholm's narrowest alley is barely over two feet wide.

A wooden street sign is the last remnant of this 400-year-old alleyway.

A man has revenged his true love's betrayal through tears and stone genitalia.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Sweden's oldest animated sign is still lighting up the skyline today.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

Pigduck of Turku.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

An alien church provides much needed silence in the midst of a Finland shopping center.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Only a fragment of this 15th-century Dance of Death survives today.

The Guardian of Tallinn.

The oldest continuously operating pharmacy in Europe.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

2300-year-old Roman road connecting the empire.