Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

This single room has survived the centuries with almost no deterioration.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

The location of the world's first telescope demonstration.

Lumps of significant stone from around the world surround a flaming monument for peace.

The largest 19th century panorama in the world still in-situ.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

The former headquarters of history's oldest megacorporation.

Europe's official "zero-level," the equator of elevation.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

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

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

A public urinal so pretty, it was declared a national monument.

A beautifully eclectic mix of architectural styles.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Museum preserving torture methods from the past.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Climb through the life of a Mexican hero as you ascend a 130-foot statue.