The southernmost outpost of the Russian Empire in colonial America.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

An ancient knight and a symbol of the city's freedom.

A tiny church on a man-made island in the Adriatic.

Bridge that died in war and was resurected.

This historic black and white monastery is one of Bulgaria's architectural jewels.

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

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The largest known Ancient Egyptian obelisk.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

This nugget of paradise earned its name for obvious reasons.

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

Hindu temple of the dead home to hundreds of long-tailed macaques.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

A community farm in the midst of the Brooklyn concrete.

Church featuring "high Victorian gothic" architecture.

New York's oldest concrete structure is being preserved thanks to the gentrification of Whole Foods.

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

Historic Greenpoint theater, turned roller disco, now housing a chain pharmacy store.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

A modern zoetrope on the New York City subway.