American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Historic Hull Street was actually the first street with a proper name in the Boston area.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This spectacular bridge is part of an abandoned train line that once connected Mallorcan capital to the southeastern coast.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

The cathedral stands in New Jufa, Isfahan's Armenian quarter that was established in 1606.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Mysterious stone tower featured in many alternative histories of the New World.

A 60-room castle constructed by a horse-racing heir.

This tribute to the founding father of the American dictionary originally contained a spelling error.

A staircase made of gravestones leads up to this church built into a giant rock.

A Byzantine-era church hidden in a wooded area below the Acropolis.

Step inside an ancient beehive tomb built for a mysterious cult hero.

The historic building has preserved human organs, unusual hexagrams, and scars from a political assassination.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.