Frida Kahlo's childhood home, now a museum of her life and works.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The ritual has been performed uninterrupted for nearly 700 years.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

There's an exclusive Beefeaters pub hidden in the Tower of London.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A marvel of Byzantine engineering under the streets of Istanbul.

An eclectic treasure trove of maritime marvels.

This tiny museum's sizable collection is jammed into a former underground public toilet.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

A hugely vast Irish landscape of barren rock that stretches for miles.

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

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

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