Beloved bar home to musicians of all eras and reputations.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

To find the "unicorns of the deep" you've got to go downstairs.

A chance to follow in the footsteps of the word's most legendary animator.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

Years of archaeology, just chillin' by the water cooler.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

This historic hotel invented the chocolate brownie.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

The mirrored section takes the shape of Hebrew characters when viewed from above.

A line number in Amsterdam that will likely never be used again due to its tragic history.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

A set of seven houses, each built in a style that represents a European country.

Europe's official "zero-level," the equator of elevation.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

Amsterdam's former hotspot for public executions and dissections.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.