An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

This World War II relic let Allied pilots know they were entering neutral airspace.

It was once nicknamed "the most bombed hotel in Europe."

Former headquarters of the KGB.

Dozens of padlock-trees along the Moscow River.

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

Stalinist skyscraper built with help of cryotechnology.

This massive monument honors the first human in space.

Gargantuan home of Russian science.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

This effigy of Peter the Great is greatly disproportionate.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

Walk in the footsteps of the gods and straddle two tectonic plates.

Medicinal spa created with the discharge from a geothermal energy plant.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The commemorative stone column conceals a secret laboratory.

The Great Fire of London and the regulation of one-way streets both started in this alley.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.