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

Certain traditions prevail on the least-visited island of the Aran Islands.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

This is the oldest Roman-made bridge in the city still existing in its original state.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

A vertically floating hemlock controls the waves and weather at Crater Lake.

Statue commemorating the use of ether in anesthesia.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

Scary metal statues adorn some of the signature buildings of Burlington, Vermont.

A hollow cement depiction of time's inexorable effect on the human body.

This statue intended for children to enjoy became a minor political spat.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

This curious, round temple is the oldest still-standing marble building in Rome.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.