Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.

A moody and picturesque riverside ruin overgrown with vegetation.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.

The remains of a majestic house that was once stood in the crosshairs of the Irish Republican Army.

A hugely vast Irish landscape of barren rock that stretches for miles.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

A stunning medieval castle owned and restored by the famed actor Jeremy Irons.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

An oddly conical beacon perched atop beautiful Irish cliffs.

A ruined castle stands atop a hill surrounded by dragon lore.

Largest illuminated advertisement sign in the world.

This monolithic slab of art metal crowns a German slag heap.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

A bridge that has seen many reiterations over its lifetime.

The world's longest wildlife overpass provides Hilversum's critters with a safe alternative to trying their luck on the roadway.

A large measuring stick marks the lowest point of a country that is partially under sea level.

A condensed piece of China floating in a Dutch harbor.

An icon of International Style architecture on the outskirts of Rotterdam.

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

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

Amsterdam's former hotspot for public executions and dissections.