A massive, abstract lookout tower providing a panoramic view of Prague.

The rusted creatures wait to be discovered in Prague's botanical garden.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

The first museum in the world devoted to sexual gadgetry.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Two stunning 17th-century libraries and a cabinet of curiosities.

Unusual building appears to be haphazardly built from randomly piled bricks.

Architectureal fantasy quarter of Rome.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A replica of the straw hut where Vladimir Lenin lived in hiding, disguised as a hay farmer, in 1917.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

Once a meeting point for Swahili slave traders, this ancient tree is now a monument to those killed by the slave trade.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

A black cat protests the City Guild in Riga's Old Town.

Flamboyant architecture from the turn of 20th century.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

Guests become prisoners on a visit to Latvian prison.