This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Soaring over the Niagara Whirlpool since 1916.

One of the largest underground systems runs under Canada's largest urban center.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

A fantastic castle rumored to be the birthplace of King Arthur.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

North Korea's massive "hotel of doom."

One of the largest public squares in the world, named after the former DPRK supreme leader.

This North Korean pegasus statue was built as a symbol of the speed and perseverance of North Korean workers.

A giant bronze monument to Kim Il-sung and Kim Jong-il is one of the most sacred sites in North Korea.

A highly symbolic tower in honor of Supreme Leader Kim Il-sung's personal philosophy.

A symbol of the Workers' Party of North Korea.

This abandoned-looking amusement park is frighteningly open for business.

This antique thermometer honors the creator of the first universal temperature scale.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Monastery, army base, and infamous Soviet Gulag in the far Russian north.

The ancient remains of this natural fortress can still be found along the Silk Road looking surprisingly preserved.