Prime Meridian Line
Straddle the hemispheres at Greenwich's historic longitude line.
At a Glance
Best Ages
5-12 years
Cost
£9-£18
Time Needed
1-2 hours
Indoor/Outdoor
Outdoor/Indoor Elements
Weather Fit
Good except bad weather
Stroller Access
Yes, step-free
Washrooms
On-site with baby change
Food
Cafe on-site
Parking
Public lot nearby
Booking
Recommended
Parent Effort
Medium (supervision)
This iconic spot in Greenwich presents a perfect blend of education and visual delight for families keen on astronomy and history.
About This Place
The Prime Meridian Line at the Royal Observatory, Greenwich, offers visitors a unique chance to stand astride the line dividing the eastern and western hemispheres. This historic site not only signifies 0° longitude but also played an essential role in establishing the world's time zones. The Royal Observatory provides engaging insights into astronomical science and the history of time, enriched by exhibits like John Harrison's marine timekeepers and the Great Equatorial Telescope. Visitors can enjoy stunning views from the Meridian Courtyard over Greenwich Park, and admission to the line is included with entry to the observatory.
Official Website open_in_newFamily Adventure
Step on a line that splits the world!
Learn
Engaging exhibits on time and navigation.
Viewpoints
Stunning vistas of London's skyline.
Good to Know Before You Go
- Monday – Sunday
- 10:00 – 17:00
- Booking
- Recommended.
- Washrooms
- On-site facilities available
- Parking
- Free parking available in the area
- Food Policy
- Cafe and picnicking areas available
- Safety Notes
- Visibility of the area with staff supervision
- Official website
- Visit site
Kid Fit by Age
Limited engagement for infants.
Some interest in visual aspects.
Interactive elements.
Engaging and educational.
Appeals to scientific curiosity.
May engage with history and technology.
- •Secure perimeter around the line.
- •Well-monitored visitor area.
- •Emergency services available on-site.
- •Step-free access to main attractions.
- •Accessible restrooms.
- •Sensory considerations in exhibits.
schedule Best Time to Visit
Weekdays and non-peak times for quieter visits.
shopping_bag What to Bring
- check_boxWeather-appropriate clothing.
- check_boxCameras for memorable photos.
- check_boxWater bottles (refill spots available).
Location
Address
Royal Observatory, Blackheath Ave, London SE10 8XJ, United Kingdom
Phone
+442083126608
Make it a half-day
View All London
Insider Tips
Combine visit with nearby attractions for savings.
Capture the night laser for a unique photo.
Audio guides enhance the experience, available on-site.
Planning a birthday?
Get exclusive party packages and dedicated hosts for your special day.
Last checked: 2026