Major tourist destination known for its bubbling mud-pools and hot thermal springs.

The platform atop this verdant volcano was built with the help of a royal elephant.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

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.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

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

This stone complex marks the urban center of a lost civilization.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

The modern birthplace of Irish freedom.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

One of Ireland's most infamous prisons for rebels including men, women and children.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

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