The Great Tsingy has a smaller, rose-colored cousin.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

A Christian monastery stands on what was once a holy Incan temple.

Death road of Bolivia.

An ancient burial ground believed to have been used for ritual sacrifice.

Founded in 670, this ancient mosque is an architectural time portal.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

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

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

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

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

Why trying to get lost in the old quarters of Essaouira may be harder than you think

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

The oldest Roman lighthouse still in use.

This bridge was constructed from the rubble of the infamous Bastille.

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

Mausoleum and Holy Seat of Antiochus I of Commagene.

Singapore's landscaping project is home to 18 incredible Supertrees.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

A marvel of Byzantine engineering under the streets of Istanbul.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.