Stonehenge (UK): You need to book a VIP tour if you want a Stonehenge shot like this. Stonehenge Tours offers privileged access to the Stone Circle at dawn and dusk when the site is closed to the general public, though tours are often sold out months in advance.
Sistine Chapel (Vatican City): Touring the Sistine Chapel with the thousands of other visitors shuffling through can be disheartening. Italy With Us offers VIP after-hours tours that include access to Raphael's Rooms and the Vatican Museums.
Sagrada Família (Barcelona): "We've privatized the Sagrada Familia in Barcelona, a couple of Michelin-starred restaurants in Andalusia and museums in Florence and Paris," says Greg Sacks of travel company Trufflepig, which arranges private tours of popular attractions. The Sagrada Familia church is one of Barcelona's most trafficked attractions.
The Louvre (Paris): Scenes like this are nonexistent during operating hours at the Louvre in Paris. According to Sacks, the price tag for privileged access to popular cultural attractions can range from $9,000 to $40,000 -- but don't expect to find any of this information online.
MoMA (New York): The Museum of Modern Art (MoMA) is one the world's most trafficked museums, drawing more than 3 million annual visitors. The museum offers a select number of one-hour private guided tours outside of regular operating hours.
Forbidden City (Beijing): Beijing's Forbidden City is one of the city's most popular tourist attractions (general view pictured). But to get inside its Shu Fang Zhai Palace, an architectural marvel that remains off limits to the general public, you'll have to book a special tour through an outside company.
Faraway Bay (Australia): Faraway Bay is a fly-in wilderness area in the remote Kimberley region of Western Australia. It's home to one of Australia's most comprehensive collections of Aboriginal rock art. One of the only ways for the general public to visit these largely inaccessible galleries is on a "rock art retreat."