Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

The shiny silver little brother to Copenhagen's Little Mermaid statue.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

This risqué sculpture, based on a Hans Christian Andersen fairy tale, caused outrage 35 years after it was erected.

This aged paving stone, marked by a maiden's foot imprint and the tales of her plunge from the cathedral tower, serves as a memorial to a tragic local legend.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

This bell stars in a tragic love tale and is said to make wishes come true.

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

A statue honors the children who fought Nazis in Poland.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

Walk the whole Mississippi River!

One of the last Depression-era bandshells still standing was the site of Elvis Presley’s first live concert.

Home to drunken tower-climbing goats... seriously.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

This homegrown adoption center offers a wonderland of feline companionship.

At 207 feet, one of the world's longest continuous escalators.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

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