This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The famous author's cottage hideaway.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

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