This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

The modern birthplace of Irish freedom.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

These engineering masterpieces are a dominant feature of the Belfast skyline.

This massive monument has been telling the time for 150 years—at a slight angle.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

Belfast's namesake river still winds below the city center, hidden from sight.

These barriers stand as stark reminders of Northern Ireland's troubled past.

One of Ireland's most infamous prisons for rebels including men, women and children.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Northern Ireland's Brobdingnagian stepping stones.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.