Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

The "Seinfeld" diner.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Stand at the center of this lakefront sundial, and you'll become part of the timepiece.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The walls of the iconic dome are hollow and have a secret stairway.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

The legendary building that needed ghostly approval before being built.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A man-made island in scenic San Francisco Bay.

Golden Gate Park's historic collection of plants.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

An artsy hidden staircase leads to breathtaking views of San Francisco.

The large fjord lake is thought to be the home of "Ogopogo," a giant sea serpent.

The world's longest covered bridge is a quaint and incredible wooden tunnel.

This exuberantly curated landscape is one of the largest sculpture gardens in Canada.

A swirling spectrum of stained glass dazzles visitors who enter this subway station.

The floating gallery illuminates the heart of Québec City's arts district.

This former prison now houses a lovely library devoted to Quebec's oft-maligned English-speaking history.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.