The capital of Cambodia is named after the hill on which this ancient temple complex stands.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Large collection from the 3rd millennium BCE.

Its unique collection details the history of the state's svelte railroads.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

Located just behind a quiet residential neighborhood, this is ground zero for the Salem witchcraft hysteria of 1692.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A lush indoor jungle fills this bustling Madrid transportation hub.

When the Soviets destroyed the historic Armenian monastery they somehow left its bell tower intact.

Quito's historic, main square dates back to the 16th century.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

The highest point on the island known for buildings that touch the sky.

Phil Mortillaro uses keys to bring art back to the Village.

The site of the deadly Triangle Shirtwaist Factory Fire.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.