A local prank turned town icon.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The narrowest house in America is seven feet of pure spite.

A former major munitions plant that has been converted into a sprawling art space.

The modern birthplace of Irish freedom.

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

The largest portal tomb in Europe has a capstone weighing around 150 tons.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

An ancient neolithic tomb that only sees the sun twice a year.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

The ancient tomb acts as a calendar that keeps perfect time.

This Neolithic passage tomb forms part of a World Heritage Site.

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

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

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

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

A failed piece of Orientalism has become the proud symbol of a community.