Nature's water park in the Wadi Bani Awf valley is full of pools flanked with cliffs and natural water slides.

This lonely tomb is all that remains of a once-bustling ancient trade hub visited by Marco Polo.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

Where artisans use centuries-old techniques to build traditional Arabian ships.

This beautifully restored fortification kept the city safe for centuries.

An abandoned mountain village in Habib surrounded by walnut, apricot, and pomegranate trees.

The cluster of igloo-like domes forms the remains of an ancient burial ground.

In an Emirati park near the Omani border, a reconstructed Bronze Age tomb with impressive reliefs.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

The world's largest frame offers spectacular views of the city's past and present.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

Over time, this castle grew to encompass the entire island.

An extensive collection of some of the oldest grave markers in Lithuania.

A narrow strip of land is home to the tallest migrating dunes in Europe.

Lithuania's outdoor sculpture trail of wooden folk art.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The first museum dedicated to exploring humanity's cultural relationship with the celestial world.

A 15-foot-tall statue of the head of the Sopranos family greets passengers at a train station in southeastern Lithuania.

A 300-kilogram egg sculpture that embodied a neighborhood revival.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

An abandoned masterpiece of Soviet Brutalist architecture.