This stunning concert hall has become a symbol of Iceland's national recovery.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

An ancient hotspot for spotting schools of fish.

The twists and turns of this serpentine maze are over 170 years old.

This beach runway is off limits during high tide.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

A sturdy relic of Britain's once crucial gunpowder industry is now a haunting Cornish ruin.

Northern Ireland's Brobdingnagian stepping stones.

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

Wallabies live naturally on this Irish island.

These picturesque ruins crumble beautifully into the ocean.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

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."

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The oldest public library in Ireland.

Catholics make up 84% of Ireland's population but this Dublin museum remembers the small but important Jewish community.

A particularly disconcerting tribute to Irish martyrs.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

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

A submerged village appears when dam levels drop.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.