Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

European castle ruins in an American state park are actually the product of death and grief.

Erosion and time have created a naturally-formed water park.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Giant granite rocks standing end-to-end like a train of circus elephants.

A subterranean haunt where wine and homemade biscottis are always on the menu.

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

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

A collection of anti-communist sculptures stands watch in the Mojave Desert.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Elevated freight railway turned wildly successful urban park.

Commemorating the spot where the famous scientist fed his pigeons.

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

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

Tel Aviv's popular neighborhood went though endless waves of transformation.

One of only three fountains created by the iconic architect Friedensreich Hundertwasser.

A modern-day cabinet of curiosities housed in a 300-year-old inn.

A commemoration of over 150 of St. Louis's favorite sons and daughters.

This site honors an Israeli cargo ship that was destroyed by the government in 1948.

The oldest continuously operating fish market in the United States.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

One of few surviving standpipe water towers in the U.S.