Go inside to really appreciate this 500-year-old technological masterpiece.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The world's largest wooden structure.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Yo, Adrian!

A layered tribute to the work of mosaicist Isaiah Zagar.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The final resting place for the remains of 143 Habsburg royalty.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.