A museum of memories in what was once one of the most violent cities in the world.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

This unofficial museum details the rise and fall of Colombia's most notorious narcotrafficker, Pablo Escobar.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

A marvel of Byzantine engineering under the streets of Istanbul.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

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

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

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

This hunter-gatherer architecture is believed to be the oldest religious complex known.

This famous city eluded concrete detection until the early 2000's.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Roman ruins top white travertine terraces formed by ancient hot springs.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

Storied crypts fill the most famous cemetery in Colombia.

Colombia's first concrete structure doubles as a replica of Versaille's Petit Trianon Belvedere and a symbol for development.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

The world's first crowdfunded skyscraper has not gone quite to plan.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

This tiny shop has been serving traditional tamales for more than 200 years.

A quirky and charming restaurant founded by artists.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.