Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This church combines Christian, Byzantine, and ancient Greek architectural elements.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

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

An abandoned Byzantine fortress and notorious prison.

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

This marvelous work of outsider architecture is built into the cliffs of an Israeli beach.

This full-sized orange tree lives suspended in mid-air above the streets of Jaffa.

A geometric jumble of homes.

Located within one of Israel's most picturesque monasteries is also the country's first meteorological research station.

This "Jewish Sistine Chapel" was designed to reinvigorate Judaism's artistic legacy but was almost lost to misguided restoration.

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

Oldest Protestant church in the Middle East, designed to resemble a synagogue.