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

A moody and picturesque riverside ruin overgrown with vegetation.

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

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

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

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

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

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

The largest cave on the island of Menorca was likely the site of Iron Age rites and rituals.

One of the biggest Buddhist stupas in Europe, hidden from most locals.

An abandoned cable car station located on the Danube stands like a haunted house above the river.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

The metal leaves on this tree are engraved with the names of Holocaust victims.

This sculpture honors the man who was known as the "Righteous Among the Nations."

A plaque bearing the names of those who dedicated themselves to protecting Budapest's Jewish population during World War II.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

A scene from one of Hungary's most famous novels.

This statue honors one of Budapest's most beloved literary characters.

Time stands still at this serene burial ground in the center of Budapest.

This hidden art nouveau gem was designed by an architect in search of a national style.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

Colorful and chaotic stacked hotel in North Holland.

Concentrated around the Dead Sea, these surprising canyons are filled with coursing water, fish, and even crabs.