Two of Hertfordshire’s attractions have been voted the best-loved free visits in the whole of England, they include a ruinous Roman wall and a museum founded by an eccentric mega-rich collector.

Can you guess what they are?

One is the Roman Wall of St Albans, built between AD 265 and 270 to defend the Roman city of Verulamium, which was the 14th most popular.

The structure can still be traced for most of its two-mile circuit. It reached a height of five metres at its peak and was topped by a walkway protected by a 1.8 metre parapet - giving some indication of the importance placed on what was then Roman Britain's third largest town.

The second attraction, also in the county, is Tring’s Natural History Museum, which was established in Victorian times by Lionel Walter - the second Baron Rothschild – which was placed at number 23.

See where else made the list:

1. The Lake District (Cumbria)

2. Peak District Hills (Derbyshire)

3. Brighton Pier (East Sussex)

4. Hadrian’s Wall (Multiple counties)

5. Newquay’s beaches (Cornwall)

6. Scarborough beach (North Yorkshire)

7. Royal Air Force Museum Cosford  (Shropshire)

8. Durdle Door (Dorset)

9. Worcester Cathedral (Worcestershire)

10. Tie: Aysgarth Falls (North Yorkshire) and King’s Lynn beach (Norfolk)

11. Royal Crescent Bath (Somerset)

12. Wells Cathedral  (Somerset)

13. Southwold Pier (Suffolk)

14. Roman Wall of St Albans (Hertfordshire)

15. Royal Armouries Museum Leeds (Yorkshire)

16. Titanic walking tour Southampton (Hampshire)

17. Avebury Stone Circle (Wiltshire)

18. York Observatory (Yorkshire)

19. Birmingham Museum and Art Gallery (West Midlands)

20. Tie: Stafford Castle (Staffordshire)  and Royal Albert Memorial Museum and Art Gallery Exeter (Devon)

21. Tie: Ashmolean Museum Oxford (Oxfordshire) Donnington Castle (Berkshire) Coventry Transport Museum (West Midlands) and Buxton Pleasure Gardens (Derbyshire)

22. Rochester Cathedral

23. Tie: Uffington White Horse (Oxfordshire) and Tring Natural History Museum (Hertfordshire) and Lickey Hills (West Midlands)

24. Lincoln Roman Trail (Lincolnshire)

25. Museum of Liverpool

26. Brimham Rocks (North Yorkshire) and Low Force Falls (Tees Valley)

27. Papermill Lock and canal side country walks (Essex)

28. Redcar beach (North Yorkshire) and Anthony Gormley structures Crosby beach (Merseyside)

29. Hull Maritime Museum (East Riding) and Thetford Priory (Norfolk)

30. Gainsthorpe Medieval Village (Lincolnshire) and Discovery Museum (Tyne and Wear)

31. National Glass Centre Sunderland

32. Silchester Roman Walls and Ampitheatre (Hampshire)Tie: Elvaston Country Park (Derbyshire) and Bolton Steam Museum (Cumbria)

33. Northampton Museum and Art Gallery

34. Banksy walking tour (Bristol)

35. Royal Pump Rooms Museum and Art Gallery Leamington Spa (Warwickshire)

36. Rufford Abbey (Nottinghamshire)

37. Auckland Castle Deer House (County Durham)

38. Birmingham Library (West Midlands) and Belgrave Hall (Leicestershire)

39. Buckinghamshire County Museum

40. Dudley Museum and Art Gallery (West Midlands) and Sunderland Museum and Winter Gardens (Tyne and Wear)

41. Tie: Cirencester Park (Gloucestershire) and Hull and East Riding Museum (East Riding) 18 and Jewry Wall Museum Leicester (Leicestershire)  and Ankers House (County Durham)

42. Novium Chichester (West Sussex)

43. Morpeth County Bagpipe Museum (Northumberland) and Allen Banks and Staward Gorge (Northumberland)

44. Farnham Castle Keep (Surrey) and Museum in the Park Stroud (Gloucestershire)

45. Bolingbroke Castle (Lincolnshire)

46. Cogglesford Watermill (Lincolnshire)

47. Houghton House and Stotford Watermill and Nature Museum (Bedfordshire)

48. Ludgershull Castle (Wiltshire)

49. Walton Hall and Gardens (Cheshire)

50. St Mary’s Church Painswick (Gloucestershire)

The survey collated the top 50 free visitors’ attractions across the country as part of the National Express’ Get out of London campaign.