A bright little alley in La Boca is a part of tango history.

A record-breaking pool that uses computers to turn ocean water into cleaner, private swimming water.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

The prototype for all Nazi concentration camps.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Northern Ireland's Brobdingnagian stepping stones.

This former steel and coal plant is now a neon-lit industrial fantasia.

The home of the Dead Sea Scrolls is an abstract modernist dream.

After over 100 years out of service this landmark windmill once again turns as a symbol of Jerusalem's self-sufficiency.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

Oldest Protestant church in the Middle East, designed to resemble a synagogue.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.