Dine amidst exotic plants at this former royal greenhouse.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This former royal palace with gorgeous gardens became the first museum in Morocco.

A long-buried ancient ruin unearthed right in the middle of the city.

This 16th-century Moroccan fortress-turned-armory museum offers prime views of the historic quarter in Fes.

The ruins of a medieval monastery built on a perilous slope.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

The designated Jewish quarter in Fez dates back to the 15th century.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

This network of narrow, medieval passages has the most delightful name.

A section of the long chain that blocked enemy ships from entering Constantinople.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

A spiritual sanctuary in a natural cave.

The western face was supposedly left clock-less to snub the Welsh.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A Hungarian pharmacy museum with a box full of mummy powder.