An ancient capital city that dates back 3,000 years and harbors many surprises.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

A park dedicated to the titular writer filled with references to his work.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

This graffitied 19th-century building was a prototype of European industrial architecture.

The ruined doorway is a portal to the building's turbulent and torturous past.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

Legend says this sacred tree was a gift from goddess Athena.

According to legend, this ancient column contains healing properties.

A Byzantine-era church hidden in a wooded area below the Acropolis.

This historic stone bridge has an entire neighborhood clinging to its sides.

Beloved children's TV characters freckle the German city's streets.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This castle has links to Portugal’s founding and struggles for independence.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A small but charming botanical garden that contains many exotic plant species.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.