Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

The solemn exterior conceals an opulent interior of this 17th century church.

Baroque celebration of the end of the Great Plague of Vienna.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

Legend says this sacred tree was a gift from goddess Athena.

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

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Final resting place for hundreds of prisoners of war.

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

An amazing collection of curiosities hidden in a small Welsh village.

A museum of magic with a Sadist past.

The tomb of history's greatest potato promoter is surrounded by tubers.

France's most famous cemetery, with some of its most curious tombs.

The longest and tallest aqueduct in Britain can actually be sailed across.

Go deep down into the earth to experience the world of Welsh coal miners.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

London's old-school healing garden.

A grave marker depicting a body snatching tableau on a 19th-century tombstone.

A striking glass tribute to two sisters who suffered during Scotland's "Killing Time."

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.