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

Walk over a 150 year old manhole.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

The abandoned transportation hub hides within the Glasgow attraction it once served.

A serene public space nestled within the remains of Glasgow’s Victorian maternity hospital

An eccentric aristocrat brought these Australian natives to their current Scottish home.

Largest lake in Great Britain measured by surface area.

A local tree surgeon has created a whimsical walk full of carved tree stumps near Scotland's Loch Lomond.

This colorful statue welcomes visitors to a Barcelona park.

An early 20th-century bullring converted into a modern shopping center.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The world's first combination ski slope and power plant.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Catacombs turned marketplace.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Tragedy on Little Brewster Island memorialized.

A mysterious stone embedded at the base of a historic Boston building.

Millions of numbers carved in glass represent the tattoos forced upon victims.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.