These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

An underground magnet for ever-changing street art.

A colorful square marks the heart of the city's LGBTQ community.

A museum and shop on Bourbon Street located in the French Quarter.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

The most confusing clock in New York.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Avoid gangster interaction while window-shopping.

The world's largest piece of copyrighted artwork.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of the last doorless, continuously moving elevators still in use in the U.K.