This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

A charming beach town in Turkey captures all the colors of the rainbow.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

"Holy Wisdom" overlooks the city that became its namesake.

This building has two facades of clashing architectural designs.

A striking symbol of the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

A Turkish ghost town abandoned in a population exchange with Greece.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Ancient serpentine sacrifice holder that has stood the test of time.

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

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

An emerald-green grotto just a short trip from Austin.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.