Ancient rock-hewn town that witnessed key events of Georgian history.

Underground monastery and fortress.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

You'll find just about anything in this funky Tbilisi flea market.

Unusual building appears to be haphazardly built from randomly piled bricks.

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

A meow-velous tribute to a beloved street cat, made famous on the internet.

A charming beach town in Turkey captures all the colors of the rainbow.

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.

A deadly ancient portal to the underworld.

This famous city eluded concrete detection until the early 2000's.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

This museum was invented in a novel before being made real by the author.

Step back in time and witness the fall of Constantinople.

1513 Turkish world map, full of European state secrets and snarky commentary.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

The deepest metro station in the world.

A beautiful art space and unusual mini-hotel hidden in the city center of Dnipro.