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

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This curious fresh and salt water lake holds a secret that draws in deep divers from around the world.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This historic little railroad runs through some of the most beautiful scenery in Germany.

A ring of soy sauce bottle bases decorate an important Singaporean landmark.

This fountain was once heralded as the largest in the world.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

This house is one of the most colorful in the country, and is the last remaining example of a historic villa.

Iranian tombstones shaped like male and female sexual organs.

Iran's colorful terraces are a rare geological masterpiece.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

One of the most ethnically diverse spots on the planet.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

These "50 Fortresses" have been unearthed in the ancient oasis of Khwarezm.