The Columbia Road Flower Market is now open every Sunday, rain or shine.

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

One of the smallest bookstores on the planet.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

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

The world's oldest bookshop still in operation.

This charming candle shop has been in business since 1789.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A student driver's nightmare.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

A lush green oasis in the middle of Chicago.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

An avant garde art museum at the University of Chicago.

This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

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

Where dioramas can follow you home.

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

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A display of magnificent stained glass windows is the first exhibit of its kind.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.