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

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

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

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

These ancient ruins hide in plain sight next to a dessert shop.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

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 third-tallest lighthouse in the United States stands as a reminder of Atlantic City's early days.

This water tower commemorates the invention of the transistor on this site in 1947.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A semi-scholarly approach to sex.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

The former hotel where Tesla invented the radio.

Nikola Tesla's former home contains an homage hidden from plain sight.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

Come for the springs; stay for the mud bath.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

Willy Wonka would love this weird half-a-home.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.