Where commuters walk through remnants of an ancient Greek necropolis.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

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

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

Scholar, adventurer, saint, and instigator of the Goa Inquisition.

This 17th-century mausoleum is topped with an acoustic marvel.

The remains of what was, not so long ago, the world's largest city.

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

A complex of six forts embedded in the Rajasthan hills.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

This magnificent stepwell is designed as an inverted temple and adorned with 1,500 sculptures.

Miraculous vase predicts the future at this Tibetan Buddhist site in the Himalayas.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

A former military outpost of Ivan the Terrible, the 16th-century church contains some of the rarest examples of Eastern Orthodox mural paintings.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

The hallucinogenic center of the ancient world.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

One of the world’s best microminiaturist, Nicolaï Siadristy displays his lifetime of tiny creations in this museum.