A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

This historic Illinois "Muffler Man" has been converted from axe-touting lumberjack to rocket-wielding space ace.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

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

Lie in a hammock where George Washington stood.

Ride the subways of yesteryear.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Elevated freight railway turned wildly successful urban park.

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

The most confusing clock in New York.

An artist's cute bronze subway sculptures belie his violent artistic past.

Red frames showcase remnants of one of New York's original subway stations.

A graffiti Mecca welcoming artists from around the world.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One of only two commuter aerial tramways in the United States.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.