The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

This small fort played a huge role defending Puerto Rico’s capital city.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

A Circus legend leaves an unexpected endowment.

A lone gunner's station is all that remains of a replica Spanish Fort in Florida.

An eclectic treasure trove of maritime marvels.

A luxuriant botanical garden below sea level.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

The trials and tribulations of marking Poe's grave.

A museum dedicated to exhibiting remarkable outsider art.

A former major munitions plant that has been converted into a sprawling art space.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.