Wonderland replication in progress by one persistent man.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

An ancient Egyptian temple in the middle of Madrid, Spain.

Mountain where Jesus was first tempted by the Devil.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

A beautiful but toxic fountain of mercury.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Rare documents, old instruments, and gruesome specimens showcase the history of military medicine.

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

An incredibly random collection of wax figures is displayed in a shopping center walkway.

Dark, eerie exhibits make for a surreal exploration of the subconscious.

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

This iconic Russian space museum sits on a landmark space production facility and houses the Vostok 1, the first manned spacecraft, that was also built here.

Secret Soviet city once home to Russian cosmonauts and space training facilities.

The laboratory where the Soviet secret police invented exotic poisons used to kill dissidents in hideous and (mostly) untraceable ways.

A magnificent, Disneyesque chateau built for 150 lucky kindergarteners.

A Marxist summer camp full of fantastical statues lies tucked away and forgotten in the forests of Moscow.