A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

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

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Reminders of the Battle of Berlin still scar the railway.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

In this truly magical place, rent hasn't been raised since the year 1520.

Designed as a place for patients to take in the scenery, this tower has a dark history.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

The commemorative stone column conceals a secret laboratory.

Washington's iconic carousel has a nice piece of Civil Rights history.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.

Every week, a festive public jam session breaks out in downtown Asheville.

A nourishing complex of found object art, paintings, and sculptures that celebrate key figures in Black history.