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.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Most complete collection of Gymnosperms in the world.

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

The history of sea-faring refuse and disaster is on cramped display in this Netherlands folk museum.

This vast World War II defense line was the site of a fierce battle.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.