The world's largest reflecting pool is just two centimeters deep.

The largest underground church in Europe.

A tiny, forgotten park of surrealist sculptures in Angouleme.

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

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

This legendary city has been a tourist attraction for centuries.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A celebration of solstice followed by a fiery purging of evils.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

At the United Kingdom's only residential library you can sleep among the books.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

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

A scenic canyon with thick forests and historic ruins.

Resonant stone, that has been played since prehistoric times.

Spring that emits water and fire at the same time is said to have remedial properties, and sparked its own religion.

Crawl through the hole in the middle of this stone to break off a bad relationship or initiate a good one.

The stunning interior of this Gothic church is covered in ornate gold details.

A magical museum of fairy tale treasures near Cyprus' buffer zone.