This haunting sculpture stands as a memorial to the torture victims of the Brazilian military dictatorship.

This public elevator links the lower city to the upper city of Salvador.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

This historic stadium was built to host the first-ever FIFA World Cup.

Follow the original medieval paths that wind through this intriguing section of the city.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The deepest metro station in the world.

340-foot statue built to honour the Heroes of the Soviet Union.

A marvel of Byzantine engineering under the streets of Istanbul.

Where commuters walk through remnants of an ancient Greek necropolis.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The only place where can you share a seat with the bums of the Fab Four.

A open air theatre built on a cliff by an eccentric British woman.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Outlaws, hot springs, and tragedy have all left their mark on this ancient road in the Icelandic highlands.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

This charming English house was once the home of England's most famous poet.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

This unique collection of lawnmowers includes vintage blueprints and automatic robot mowers.