One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

A tunnel with windows, so you don't miss out on the impressive views.

The fifth-longest natural arch in the world, and the longest outside China.

Come for the speed, leave in love with the desert.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The location along the shores of the Great Salt Lake of what was once called, "The Coney Island of the West", now sits barren due to arson and time.

A geological mystery on Camelback Mountain.

An ambitious developer built what was once the world's tallest fountain in a Phoenix suburb.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

A brightly colored natural bridge formed by mineral-rich hot springs high up in the Andes.

The former epicenter of the Ecuadorian textile industry, turned museum.

Massive volcano in the Andes is the farthest point from earth's center.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

A turquoise lake within a volcanic crater.

Building this tragically pointless stone barrier cost the lives of the prisoners made to build it.

Morocco's largest Jewish cemetery.

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

God's Saharan sandbox of wrath.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

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.

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

One of the most spectacular canyons in the world.