The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

Tiny memorials honor individual victims of the Holocaust.

The world's first motorway was used as a racetrack until the late 1990s.

Celebrating the works of a beloved Italian actor, known for such cult films as 'They Call Me Trinity' and 'Watch Out, We’re Mad!'

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

Once a slice of Cold War-era military history, this museum is finding its future in the star.

The southernmost postal office in South America.

A chessmaster's dream destination.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

This is not your typical jungle gym.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

This Asian-inspired tower in a lush urban park provides spectacular panoramic views of Baltimore.

This grove was planted more than a century ago by the War Mothers of World War I.

Wedged between two sets of row houses is an awkwardly located family graveyard.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

An old pay phone rewired to play local bird calls and songs at the press of a button.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

This hidden treasure provides a charming access point along the south side of Baker Park.

These five Art Deco homes were meant to solve the "small house problem."