This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Ancient barriers wrap around what was once an important stop along the Silk Road.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

The largest Lenin statue in Central Asia was moved to an empty field rather than being destroyed.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

This Soviet statue is based on a piece of propaganda that's been elevated to national myth.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

Beatlemania is still going strong... at least in Kazakhstan.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

Hidden in plain sight, this creepy sculpture watches from above.

A historic hill of tall tales, with one rather special tree.

There are hundreds of secret WWII bases hidden in British forests. Built to fight a Nazi invasion, they remained unknown for decades.