Scale model of St. Peter's Cathedral (Rome) in the middle of a small Dutch town.

The Netherlands is home to a bridge printed out of reinforced concrete.

This ancient Roman arch misled treasure hunters for centuries.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

The only Malaysian food truck in Italy slings tangy chicken satay that even Italians love.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

A study of Fascist era Art Deco design in Italy.

The only substantial part of Nazi Germany's formidable defensive line through Northern Italy that survives today, largely intact.

The sunlight passing through the opening of this huge cave system creates a magical effect.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

This Italian foot path winds through the mountains via 52 individual tunnels.

David Sedaris called it "The greatest shop in the world."

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

This hidden gem is bathed in beautiful natural light.

This shuttered power plant is now Turkey's first industrial archaeology museum.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Turkish adventurer antiques in the heart of the Grand Bazaar.

Cannon designed to fire an atomic warhead.

Journey up the capitol building's cupola for an amazing view of Topeka.

During the 1990's nearly all of the world's LSD is thought to have come from the operators of the lab once located in this missile silo.

Home to Hollywood history and a very special salt crystal.

This gold-winged spire celebrates the first true flight around the world.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.