This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

Gargantuan home of Russian science.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

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

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

An ornate tomb pays tribute to one of the most influential and cherished military leaders in Vietnam's history.

These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

This striking landscape in northern Vietnam contains both geological and archaeological wonders.

An extravagant monument to an extravagantly unpopular Emperor.

World's largest cave was only discovered in 1991, and now offers tours to the public.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

Massive, unfinished broadcasting station stands as a monument to the fall of communism.

These natural cliffs look like they are a part of an old castle complex.

Ruins of an early Roman Christian church dating back to the 4th to 5th centuries.

A mysterious tunnel hidden in the shadows of a colorful, historic sanctuary.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

UNESCO-protected ancient burial ground.