Charnel house at the foot of Mount Sinai.

The deadliest diving spot in the world is also a stunning geological marvel.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

An ever-growing literary collection housed in the apartment where the Russian author penned his final novel.

Hidden in a metro shop under a shopping mall, this small museum tells the story of one of the world's largest urban transit systems.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

With over 10,000 lights, this engineering marvel lights up the city after dark.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

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

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

Half of the Pulitzer Prize-winning author's ashes were buried in Armenia.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

Centuries before the modern seismograph, Armenian monks measured quakes with this tilting pillar.

She asked for a potato cellar and over the next 23 years he gave her a network of holy caves.

A geological oddity topped with a 2,000-year-old pagan temple.