A marvel of Byzantine engineering under the streets of Istanbul.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

Turkish adventurer antiques in the heart of the Grand Bazaar.

1513 Turkish world map, full of European state secrets and snarky commentary.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

A sixth-century Byzantine cistern hidden below a modern carpet store.

The ornate miniature mansions were built for Istanbul's feathered residents.

Writers such as Paul Bowles, William Burroughs, and Samuel Beckett frequented this Tangier bookstore.

This stucco building in North Africa was the first American-owned property on foreign soil.

An old airplane engine forms an unusual cairn atop this Moroccan peak.

Reaching this rock formation involves a hike through rocky rapids and springs where wild turtles reproduce.

This 16th-century Moroccan fortress-turned-armory museum offers prime views of the historic quarter in Fes.

The forgotten remnants of a land-to-sea cable car that was once unique in the world.

An eerie former warehouse turned cistern turned movie set.

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

Numerous impressive carvings are embedded in the trees lining this street in Marrakech.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

This sculpture garden creates a whimsical aura in an urban and wild environment.

A 125-meter long "tribute to the Brazilian people."

The largest library in Latin America owes its existence to an Old World earthquake and a Napoleonic invasion.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

Beautiful public park off the beaten path and away from tourists.