A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

You'll find just about anything in this funky Tbilisi flea market.

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

The decaying remains of a once-luxurious Soviet spa town.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Ancient rock-hewn town that witnessed key events of Georgian history.

Underground monastery and fortress.

The first skyscraper to include a Ferris wheel built into the facade.

Fast food feels like fine dining at this award-winning modern Georgian building.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

This lucky bronze frog was gifted to Madrid by a casino.

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

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

The earliest known map to show America, discovered by accident at a Paris bookshop.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

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