Moss-covered sculptures fill this small Brazilian gorge.

The castle still holds traces of the abandoned Roman fort it was built atop.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

These stained-glass windows are all that remains of a building that was the target of one of the biggest explosions in London after World War II.

An abandoned Santa park is as far as this proposed theme park kingdom got toward completion.

A mysterious shape catches the eye in this 16th-century painting.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

At almost 1,000 years old, this is the oldest known door in all of Britain.

Charles Babbage's proto-computer, painstakingly brought to life.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

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

A recently restored substation that dates from 1875.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Eighty million natural history specimens call this gargantuan museum home.

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

This attraction is devoted to the wonders of steam power and features a replica of one of its most public disasters.

This stone monument marks the beginning of Portugal's presence in Brazil.

This museum covers 10,000 years of Pre-Columbian Latin American history.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

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

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

This singular art museum in São Paulo is unique inside and out.