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

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

A monument to a beloved aquatic folk hero in the Irish town of Dingle.

Ireland's only cable car once carried livestock across a treacherous strait.

An important landmark in the history of algebraic logic.

On the clock tower at St. Anne's Church in Cork, you never know which face is telling the truth.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

Once the longest bridge in Ireland, this rusting span sits abandoned and overrun by nature.

A 300-year-old cottage decorated with tens of thousands of seashells arranged in intricate patterns.

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

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

Unchanged for centuries, this medieval library keeps its books in chains.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

Home to the world's oldest functioning orrery.

The 20-mile causeway that separates the Netherlands from the sea.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

Italian cave with exceptional acoustics and an unsavory history.