Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The library's graceful rotunda is like a bibliophile's temple.

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.

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

A 125-meter long "tribute to the Brazilian people."

A quirky collection flush with information on commode culture from ancient times to modern day.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

A perfectly running 230-year-old silver automaton and music box.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

An ancient Egyptian temple in the middle of Madrid, Spain.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'