One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

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

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

Morocco’s modern capital was once a haven for Barbary pirates, who went so far as to establish a republic of their own.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

Built in 1512, the oldest cathedral in the Americas.

Cathedral carved out of salt, located a mile below the earth's surface.

A fantastical and futuristic temple of light built from nine monumental glass veils.

A prestigious learning institute of old Shanghai.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

This temple located on a vertical drop of a rocky mountain houses relics from the Song Dynasty.

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

One of the holiest places in the region, devotees come to Tirta Empul to bathe in the holy spring water.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Hundreds of Buddhas in a re-discovered Indonesian temple.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

Singapore's oldest Hindu temple.