As one of the world's largest hydroelectric dams this plant took two countries to get built.

This striking, two-toned confluence of rivers is visible from space.

A beautiful opera house in the heart of Amazonia has recently restarted performances after a 90-year hiatus.

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

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

Beautiful public park off the beaten path and away from tourists.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

This interactive museum highlights the history and philosophy of one of the world's most difficult sailing races.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

Although called a funicular by both its owner and the locals this historic railroad is actually a rack and pinion system.

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

Neon artworks light up this dark Edinburgh tunnel.

The most loyal of little dogs, or a Victorian era publicity stunt?

The building where Mary, Queen of Scots was said to have bathed in white wine.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This small museum in a 17th-century building honors three iconic Scottish writers.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A sweet symbol marks the place where torturous executions were once carried out.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.