This cheese shop also houses a museum devoted to Dutch dairy.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

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

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

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

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

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This tiny museum's sizable collection is jammed into a former underground public toilet.

Iceland's tribute to its thankless civil servants.

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

An encyclopedic collection of mammal penises.

A quirky collection of outsider art made from automobile parts.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

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

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

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

Ancient burial grounds of the wealthy.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

Uppsala's adorable feline sign celebrates a popular children's book set in the Swedish city.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A toxic ghost town sitting atop a massive coal fire.