An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Double spiral staircases are not unheard of, but they are very rare.

A Christian monastery stands on what was once a holy Incan temple.

A monument to the conquistador became increasingly controversial in the very city that he founded.

The forgotten tomb of the Peruvian rubber baron who was the inspiration for Werner Herzog's epic film "Fitzcarraldo."

This bullring in Lima is the oldest in the Americas and the second-oldest in the world.

A highland eco-park celebrates more than a thousand varieties of tuber.

This high-Andean reserve protects the graceful vicuña that was nearly hunted to extinction for its precious wool.

This antique rail car has been reborn as an urban cafe.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

An Inca spa, military outpost or maybe… both?

Peru’s only toy museum houses everything from pre-Inca whistles to lead soldiers and terrifying dolls.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

A kitschy Italian medieval-style castle incongruously located amidst one of the most historic towns in the Peruvian Amazon.

The large collection of pre-Columbian pottery might make you blush.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

Hundreds of mummies in a silent room, some with eerily pained expressions preserved on their faces.

This unimaginably large pile of sand near Nazca is one of the tallest dunes in the world.

A fascinating little museum all about the rich history of Peru’s famous plant.

Now containing the bones of the actual conquistador, instead of someone else.

The highest tropical mountain range in the world is in Central Peru, home to a vast array of exotic and quirky plants and animals.

Did Inca children also slide down these smooth rocky slopes above Cusco?

A jungle cave in Peru of unknown depths, otherworldly sounds, and strange nocturnal birds that navigate by echolocation.