You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

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."

Wallabies live naturally on this Irish island.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

At this cozy bar tucked down a hidden Galway backroad, Guinness makes the Gaelic come out.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

An odd museum dedicated to French fakes.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The tomb of history's greatest potato promoter is surrounded by tubers.

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

Cat art as far as the eye can see.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

The world's only museum devoted to the wonders of fluorescence.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A museum of carnival attractions where you are invited to ride the rides.

Abandoned railway line circling the city of Paris.

Copenhagen's celebrated theme park and gardens.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

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