This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A dilapidated dock tells the story of Titanic’s missed arrival.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

A six-ton wedding present for the King of the Scots.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A winding, cliffside stretch of road overlooking the Delaware River.

100 massive sculptures in the Hudson River Valley.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

One-time largest man-made structure in the world will be a park in 30 years.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

There must be a pun in this haystack somewhere...

The site of the deadly Triangle Shirtwaist Factory Fire.

Avoid gangster interaction while window-shopping.