Source: Up at The O2
Get outdoors this spring and challenge yourself to climb the iconic roof of The O2. For £28 you can traverse the rooftop walkway and also get a souvenir photo as a memento of your achievement.
10am-8:30pm Mon-Fri 3 Apr-31 Jul
Source: Golden Tours
For £9.50 you can hop aboard a Golden Tours bus this spring for a 3-hour tour of London's most famous landmarks.
Departures every 30 minutes 9am-4pm until 21 Jun
Source: Mapledurham House
You can now snap up two tickets to the "enchanting" (The Daily Telegraph) 16th-century Mapledurham House, and get cream tea, a guidebook and a return boat trip, for £12.50 a head.
2-5:30pm (last entry 5pm) Sat-Sun; 11 Apr-27 Sep; Mon 25 May
Source: Denbies Wine Estate
Denbies Wine Estate in the Surrey hills is a family-run vineyard that produces award-winning wines. For £10.50, two people can take a tour on the vineyard train while enjoying a glass of Denbies's cuvée -- this is 50% less than the usual price.
11am, 12, 1, 2pm Mon-Sun; 6:30pm Thu 1 Apr-30 Jun
Source: Kelmscott Manor
You and a friend can now save 48% on entry to Kelmscott Manor, the Tudor summer home of famed 19th-century designer and writer William Morris.
11am-5pm Wed, Sat; 1 Apr-27 Jun
Source: Sedlescombe Organic Vineyard
For £14.50 a head, you and a friend can take a self-guided vineyard and guided winery tour of Sedlescombe Organic Vineyard, including tastings and cream tea or lunch, and discover how its award-winning wines are produced.
Until 20 Jul
Source: Portsmouth Historic Dockyard
Get two annual all-attraction tickets to Portsmouth Historic Dockyard for £25 instead of up to £42, including entry to attractions including HMS Victory, HMS Warrior, the Mary Rose Museum and HMS Alliance at the Royal Navy Submarine Museum.
10am-5:30pm daily until 31 Mar; 10am-6pm 1 Apr-20 Jul
Source: Solent Sky Museum
For £6.99 instead of £13, two adults can get up close to a range of historic aircraft, including a Sandringham flying boat, at Solent Sky Museum in Southampton.
10am-5pm Tue-Sat; 12-5pm Sun until 30 Jun. Last entry 4pm
For £6 per person, you and a friend can visit 16th-century Mapledurham House near Reading and experience Mapledurham at War -- a World War II event that boasts up to 500 re-enactors, all portraying life in wartime Britain.
10am-4pm 4-5 Apr
Source: The Ghost Bus Tours
Experience the darker side of London and its historic landmarks with this theatrical sightseeing tour. This offer saves you 50% on the regular price and is available during the Easter holidays.
9pm, Sun-Fri until 1 May
Source: Red Letter Days
Travelzoo has teamed up with Red Letter Days to offer a chocolate workshop for two -- the perfect Mother's Day gift.
Until 30 Jun
Calling all thrillseekers! This offer combines some of London's famous sights with a high-speed jetboat ride on the Thames for 31% less than the usual cost.
11:30, 11:35am, 12:30, 12:35, 1:30, 1:35, 2:30, 2:35pm Sun-Fri until 31 Jul
Source: London Premier Walking Tours
Join London Premier Walking Tours and take in some of the capital's most recognisable historic sights on foot with this half-price guided tour.
1:30pm Wed; 1pm Sat until 30 Sep
You save 40% on a London Underground treasure hunt for two. Battle against the clock and avoid the enigmatic Agent Orange to solve a series of cryptic, humorous and entertaining challenges and be crowned champions.
6:30pm Thur until 24 Sep
Source: Oxford Walking Tours
Walk the streets and quadrangles of Oxford on a 90-minute guided tour. You and a friend can discover this historic university city for £14 instead of the usual cost of £19.90.
Daily 12, 2, 4pm until 30 Sep
Source: Photography Tours at Night
Learn to point and shoot like a pro and capture some of the UK's iconic city sights at night. For £24, this offer for a 2-hour evening photography walk saves £76 on the regular cost.
Various until Jun
Source: Fly By Light
Take to the virtual skies with this better-than-half-price flight simulator deal from Fly By Light.
10am-9pm Mon-Sun until 31 May
Source: Kelly Country Sports
For £39, two people can go clay pigeon shooting and then enjoy a picnic in the Kent countryside -- saving 57% on the usual price of this experience.
10am, 1pm Sat-Sun until 31 May
You can now make a personalised A4 landscape photobook with all your favourite pictures for £8, saving up to 73% on the usual price.
Orders taken until 31 Mar
Source: City Cruises
Adults (£9) and children (£4.50) can hop aboard one of City Cruises' sightseeing boats and see London's sights from the Thames for 44% less than usual.
Daily until 30 Apr