This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

Inside this church, a monument honors the first burial site of the famed philosopher.

One of the world's oldest continuously operating meteorological stations sits on a hill in Stockholm.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

Hidden in plain sight, Sweden's official ordnance datum is now abandoned.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

This unique sculpture is often overlooked by pedestrians.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

Dozens of padlock-trees along the Moscow River.

A sculpture of graceful storks sits atop this fountain in Independence Square.

A roadway designed for a visiting monarch.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

Sweden's southernmost point is located in this charming fishing village.

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

A living descendant of the famous tree that helped Isaac Newton develop the theory of gravity.

Home to 200 plaster casts of Scandinavian proboscises.

The dome-shaped reservoir of this old water tower produces unique acoustic effects.

A striking symbol of the Bulgarian capital.

This beautiful, historic church looks like something out of a simpler past.

The modern birthplace of Irish freedom.

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

A bit of retro transportation flair preserved in the world's largest department store.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.