On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

This single room has survived the centuries with almost no deterioration.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Northern Ireland's Brobdingnagian stepping stones.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

The sign at the garden gate reads: "These Plants Can Kill."

An enormous and lavish Gothic church in Czechia.

A church of bones, decorated with 40,000 human skeletons.

A 12th-century fortress containing some of Berlin's oldest buildings.

This beautiful site is where the first transatlantic telegraph was sent from.