This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

An automaton perched above an classic clock and watch store

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient Egyptian temple in the middle of Madrid, Spain.

Tucked along a river are enigmatic stone carvings created thousands of years ago.

Legend says this tiny ancient island is the lost ancestral homeland of the Aztecs.

The translucent turquoise hue of these natural swimming pools comes from a high concentration of minerals.

Balanced rock sculptures pay tribute to a murdered conservationist and his pioneer wife.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

An ancient temple in the middle of a residential neighborhood encapsulated by a beautiful tree.

This Native American petroglyph marks the location of an important, Creek trail.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

Monument to the cotton-destroying boll weevil.

Booker T. Washington's home at the Tuskegee Institute was a gem of splendor.

An autonomous oak in Alabama.

Every last book in this bookstore is signed by the author.

148 feet long and in the middle of a verdant forest.

One person's lost luggage is another person's treasure.

This house designed by Frank Lloyd Wright and Louis Sullivan was destroyed twice and reconstructed to near original condition.

A downtown filled with nearly deserted historic buildings was revived as a pastel paradise.

This Mississippi seminary was the first in America to train Black Catholic priests.

This humble hole-in-the-wall is home to an incredible pig ear sandwich and serious civil rights history.