This Neolithic passage tomb forms part of a World Heritage Site.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

This 12-inch-tall wooden sculpture of a winged Virgin Mary has inspired much devotion and countless replicas.

One of the last mosaic tile facades found in the city.

The third-tallest lighthouse in the United States stands as a reminder of Atlantic City's early days.

The National Park Service’s best-kept secret with views that rival any in D.C.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

A 30-mile-long glacially-carved canyon leads to a massive pair of glaciers.

Opened in 1932, this theater in Stockport's Mersey Square is a bonafide Art-Deco gem.

An Art Deco Icarus statue adorns this abandoned gem of Yugoslav Modernist architecture.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

Once a resting spot for King Fernando VII.

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

This roadside stand claims to be the world's smallest bookstore.

A former military hospital is now used to study and preserve artifacts of the Acropolis.

A plaque honors Miami's sister city in the Canary Islands, inviting one to reflect on their place in the world.

In use from 1742 to 1910, only flat headstones were allowed in this cemetery.

This original castle in Kendal is 1,000 years old.

Two minuscule windows are tucked inside this medieval building.

An Ecuadorian haberdashery that sets the record straight about the so-called "Panama" hat.

This museum’s collection includes rescued birds, fine art, and a collection of shrunken heads.

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.