This legendary urban waterfall creates a dazzling display of rainbows.

Site of James Cook's historic observations of the 1769 transit of Venus.

In Bermuda, this formal naval residence has become a go-to for cliff-jumpers and hikers.

The world's smallest drawbridge.

The final resting place for Bermuda's British military, including a man who died of sunstroke.

The abandoned Bermudian home of a British naval leader is surrounded by crumbling sporting fields and the graves of convicts.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

Scars of this building's past life as a violent prison still cover its walls.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

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

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

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

This building displays the scars of the “Dekemvriana,” a dark time in modern Greek history.

Where commuters walk through remnants of an ancient Greek necropolis.

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

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

A Byzantine-era church hidden in a wooded area below the Acropolis.

These caves secretly held national treasures during World War II.

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

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.