This secluded ruin was once a home for exotic plants.

“Invented in Key West, Perfected in Brooklyn."

Wander down a side street dedicated to one of the members of the Beat Generation.

Oakland's beautiful monumental cemetery.

A museum dedicated to celebrating the humble wingnut.

The famed amusement district marks the beginning of summer with a wild procession of nautical creatures.

A wooden rollercoaster that still delivers a thrill.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

No monkeying around, this fountain was really named after the classic sci-fi film.

An intricate ceramic tile facade adorns this five-star hotel.

Drink wine handed out through a window as part of an age-old tradition.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

The largest and most famous wax anatomical collection anywhere in the world.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

The oldest continuously inhabited street in America.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The site of the climactic scene from the classic horror film is now a historic landmark.

An 18th-century townhouse that once hosted guests of the president.