Take a dip beneath the stalactites in this amazing cenote.

One of Mexico's youngest major cities still holds on to this structure representing its short modern history.

An important Mayan religious and trading center dating back to 200 BC.

These enigmatic ruins continue to vex archaeologists.

A bright, colorful telling of the history of Mexico's youngest state.

This urban park is home to monkeys and a number of endangered plants.

Strolling through these vintage locomotives offers a surprising amount of insight into the history of Kenya.

This tourist village in Nairobi celebrates the traditional lifestyles and customs of Kenyan tribes.

The farmhouse owned by the Danish author who wrote "Out of Africa" is now a museum honoring her legacy.

A pristine wildlife habitat against the backdrop of skyscrapers, nicknamed "The World’s Wildlife Capital"

This beautiful, all-in-one museum, private residence, and bed and breakfast houses a rich collection of African art.

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

Giant aluminum tusks erected over the main thoroughfare to commemorate a visit by Queen Elizabeth II.

A haven for book enthusiasts across the street from Retiro Park.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Commonly acknowledged as the only public monument to the Devil himself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Mysterious texts covered in mystical symbols were found in caves at this site centuries ago.

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

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

Spain's largest bullring offers a unique glimpse at architecture and history.

The final resting place of the great navigator, or maybe his brother.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.