The Rhone is one of Europe's major rivers -- but where does it come from? To answer this question, Matt and Rachel travel to the Swiss Alps and venture within the iconic Rhone glacier. Tune in and learn more.

The Pamukkale calcium deposits in Turkey are one of the most striking, unique parts of the country's landscape. Join Rachel and Matt as they take a closer look at the history -- and chemistry -- of the Pamukkale deposits.

Santorini is an volcanic island in Aegean sea famous for its sweeping vistas and captivating views. In this episode, Rachel and Matt take a closer look at one of the world's most picturesque tourist destinations. Tune in to learn more.

From the Powder Tower to the Dancing House, Prague is famous for the diversity of its architectural styles. In this episode, Rachel and Matt take a closer look at some of Prague's most iconic buildings. Listen in to learn more.

It's no surprise that the Trans-Siberian railway is known the longest rail line in the world: It extends across seven time zones, and passes through three countries on its route. Tune in and join Rachel and Matt as they take a virtual trip across Siberia.

In the first episode of this series, Matt and Rachel explore the unique and fascinating city of Prague. Tune in to learn more about Prague's astonishing history and iconic landmarks.

Located on Bohol Island, the Chocolate Hills cover approximately 20 square miles of the island, ranging between 98 to nearly 400 feet in height. Join Rachel and Matt as they take a closer look at the fascinating Chocolate Hills of the Philippines.

At over 550 meters tall, Toronto's CN Tower is the world's tallest free-standing tower. In this episode, Rachel and Matt explore the history and allure of this iconic structure.

Since it was built in 1973, the Sydney Opera House has become one of the world's most iconic buildings -- but why? Join Rachel and Matt as they take a closer look at the building that put Sydney on the map.

Charleston, S.C., is known for several things, including great food and beautiful steeples. Join Rachel and Matt as they take a closer look at this laid-back, charming place occasionally called 'The Holy City' or 'The City of Spires.'