The world's most active stratovolcano is almost always erupting.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

Go inside to really appreciate this 500-year-old technological masterpiece.

2300-year-old Roman road connecting the empire.

Thousands of well-dressed mummies below a monastery.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

A restaurant and observation deck built in a unique broadcasting antenna.

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

Seat of the Duke and Duchess of Devonshire for centuries.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

Semi-precious Blue John stones have been mined in this cavern system for centuries.

One of the largest mechanical models of the solar system in the world.

The oldest known metal-mining site in England dates back to the Bronze Age.

This haunting stone chasm is a hotbed of mossy rock and English legend.

A memorial to the only dog ever officially enlisted in the Royal Navy.

A beautiful viewpoint on the Garden Route overlooking a naturally-occurring outline of Africa.

Over 60 species of birds inhabit this colorful aviary park in South Africa.

This small monument marks the divide between the Atlantic and Indian Oceans at the southernmost tip of Africa.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.

A mesmerizing sculpture marks the site where the activist was arrested after evading capture for 17 months.